Vahe Petrosian
Professor of Physics and of Applied Physics
Bio
How do things evolve in the universe? How are particles accelerated in the universe?
Professor Petrosian’s research covers many topics in the broad area of theoretical astrophysics and cosmology, with a strong focus on high-energy astrophysical processes.
Cosmological studies deal with global properties of the universe, where the main focus is the understanding of the evolution of the universe at high redshifts, through studies of the evolutions of population of sources such as galaxies and quasars or active galactic nuclei, gamma-ray bursts, using new statistical techniques developed in collaboration with Prof. B. Efron of the Department of Statistics. Another area of research is the use of gravitational lensing in measuring mass in the universe.
High-energy astrophysics research involves interpretation of non-thermal astronomical sources where particles are accelerated to very high energies and emit various kinds of radiation. These processes occur on many scales and in all sorts of objects: in the magnetosphere of planets, in the interplanetary space, during solar and stellar flares, in the accretion disks and jets around stellar-size and super-massive black holes, at centers of galaxies, in gamma-ray bursts, in supernovae, and in the intra-cluster medium of clusters of galaxies. Plasma physics processes common in all these sources for acceleration of particles and their radiative signature is the main focus of the research here.
Administrative Appointments
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Teaching Assistant, Cornell University (1961 - 1961)
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Research Assistant, CRSR, Cornell University (1962 - 1967)
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Research Association, CRSR, Cornell University (1967 - 1967)
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Research Fellow, California Institute of Technology (1967 - 1969)
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Visiting Scientist, IOTA Cambridge (1969 - 1969)
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Assistant Professor, Stanford University (1969 - 1971)
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Associate Professor, Stanford University (1972 - 1979)
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Professor, Stanford University (1980 - Present)
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Iranian National Fellowship, National Iranian American Council (1958 - 1962)
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Industrial Fellowship, Cornell University (1963 - 1964)
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Fellowship, Alfred P. Sloan Foundation (1972 - 1974)
Honors & Awards
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Foriegn Member, Armenian National Academy of Science (since 2008)
Boards, Advisory Committees, Professional Organizations
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Consultant, Kitt Peak National Observatory (1971 - 1971)
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Member, Arcetri, Florence (1982 - 1983)
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Member, National Optical Astronomy Observatory (NOAO) (1982 - 1983)
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Member, Nordita, Copenhagen (1982 - 1983)
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Member, Cornell University (1982 - 1983)
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Member, Observatoire de Meudron, France (1989 - 1990)
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Member, Space Telescope Science Institute (1996 - 1996)
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Member, National Optical Astronomy Observatory (NOAO) (1998 - 1998)
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Member, Institute of Advanced Studies, Bochum University (2000 - 2000)
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Member, Eta Kappa Nu, IEEE
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Member, Tau Beta Pi, The Engineering Honor Society
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Member, Royal Astronomical Society
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Member, International Astronomical Union
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Member, American Astronomical Society
Professional Education
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Ph.D., Cornell University (1967)
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M.S., Cornell University (1963)
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B.E.E., Cornell University (1962)
2024-25 Courses
- Introduction to Cosmology and Extragalactic Astrophysics
PHYSICS 161, PHYSICS 261 (Spr) -
Independent Studies (5)
- Curricular Practical Training
APPPHYS 291 (Aut, Win, Spr, Sum) - Directed Studies in Applied Physics
APPPHYS 290 (Aut, Win, Spr, Sum) - Independent Research and Study
PHYSICS 190 (Aut, Win, Spr, Sum) - Research
PHYSICS 490 (Aut, Win, Spr, Sum) - Senior Thesis Research
PHYSICS 205 (Aut, Win, Spr, Sum)
- Curricular Practical Training
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Prior Year Courses
2023-24 Courses
- Introduction to Cosmology and Extragalactic Astrophysics
PHYSICS 161, PHYSICS 261 (Spr)
2022-23 Courses
- Introduction to Stellar and Galactic Astrophysics
PHYSICS 160, PHYSICS 260 (Win)
2021-22 Courses
- Introduction to Stellar and Galactic Astrophysics
PHYSICS 160, PHYSICS 260 (Win)
- Introduction to Cosmology and Extragalactic Astrophysics
Stanford Advisees
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Doctoral Dissertation Advisor (AC)
Abby Hartley, Maya Redden -
Doctoral (Program)
Jadyn Anczarski, Danielle Brown, Katie Brown, Hope Fu, Jhonnatan Gama Vazquez, Sadaf Kadir, Kaitlyn Karpovich, Jinwoo Kim, Shenghua Liu, Sidney Mau, Mati Mebratu, Mikhail Molodyk, Marta Nowotka, Abby Pan, Emrys Peets, Aidan Reilly, Ben Sherwin, Ana Carolina Silva Oliveira, Andreas Tsantilas, Hanyue Wang, Josephine Wong, Shuo Xin
All Publications
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Gamma-Ray Bursts as Distance Indicators by a Statistical Learning Approach
ASTROPHYSICAL JOURNAL LETTERS
2024; 967 (2)
View details for DOI 10.3847/2041-8213/ad4970
View details for Web of Science ID 001229891000001
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Progenitors of Low-redshift Gamma-Ray Bursts
ASTROPHYSICAL JOURNAL LETTERS
2024; 963 (1)
View details for DOI 10.3847/2041-8213/ad2763
View details for Web of Science ID 001169122300001
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Inferring the Redshift of More than 150 GRBs with a Machine-learning Ensemble Model
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2024; 271 (1)
View details for DOI 10.3847/1538-4365/ad1aaf
View details for Web of Science ID 001174883800001
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A New Component from the Quiet Sun from Radio to Gamma Rays: Synchrotron Radiation by Galactic Cosmic-Ray Electrons
ASTROPHYSICAL JOURNAL
2023; 943 (2)
View details for DOI 10.3847/1538-4357/acad75
View details for Web of Science ID 000928572400001
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Transport of Cosmic-Ray Electrons from 1 au to the Sun
ASTROPHYSICAL JOURNAL
2023; 943 (1)
View details for DOI 10.3847/1538-4357/aca474
View details for Web of Science ID 000918175800001
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Can the Distance-Redshift Relation be Determined from Correlations between Luminosities?
ASTROPHYSICAL JOURNAL LETTERS
2022; 935 (1)
View details for DOI 10.3847/2041-8213/ac85ac
View details for Web of Science ID 000840497500001
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Incremental Fermi Large Area Telescope Fourth Source Catalog
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2022; 260 (2)
View details for DOI 10.3847/1538-4365/ac6751
View details for Web of Science ID 000819154400001
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The X-Ray Luminosity Function Evolution of Quasars and the Correlation between the X-Ray and Ultraviolet Luminosities
ASTROPHYSICAL JOURNAL
2022; 932 (2)
View details for DOI 10.3847/1538-4357/ac6f06
View details for Web of Science ID 000814375000001
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Probing Particle Acceleration through Gamma-ray Solar Flare Observations
PROCEEDINGS OF SCIENCE. 2022
View details for Web of Science ID 001070848600027
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Cosmological Evolution of Fermi Large Area Telescope Gamma-Ray Blazars Using Novel Nonparametric Methods
ASTROPHYSICAL JOURNAL
2021; 913 (2)
View details for DOI 10.3847/1538-4357/abf65e
View details for Web of Science ID 000657118700001
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The Relation between Escape and Scattering Times of Energetic Particles in a Turbulent Magnetized Plasma: Application to Solar Flares
ASTROPHYSICAL JOURNAL LETTERS
2018; 868 (2)
View details for DOI 10.3847/2041-8213/aaedb3
View details for Web of Science ID 000451002200005
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Probing the Puzzle of Behind-the-limb gamma-Ray Flares: Data-driven Simulations of Magnetic Connectivity and CME-driven Shock Evolution
ASTROPHYSICAL JOURNAL
2018; 867 (2)
View details for DOI 10.3847/1538-4357/aae1fd
View details for Web of Science ID 000449412000011
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Implications of a Loop-top Origin for Microwave, Hard X-Ray, and Low-energy Gamma-Ray Emission from Behind-the-limb Flares
ASTROPHYSICAL JOURNAL
2018; 865 (2)
View details for DOI 10.3847/1538-4357/aadd07
View details for Web of Science ID 000445822300008
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Hard X-Ray Emission from Partially Occulted Solar Flares: RHESSI Observations in Two Solar Cycles
ASTROPHYSICAL JOURNAL
2017; 835 (2)
View details for DOI 10.3847/1538-4357/835/2/124
View details for Web of Science ID 000394585800012
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PARTICLE ACCELERATION IN SOLAR FLARES AND ASSOCIATED CME SHOCKS
ASTROPHYSICAL JOURNAL
2016; 830 (1)
View details for DOI 10.3847/0004-637X/830/1/28
View details for Web of Science ID 000385917300001
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DATA-DRIVEN RADIATIVE HYDRODYNAMIC MODELING OF THE 2014 MARCH 29 X1.0 SOLAR FLARE
ASTROPHYSICAL JOURNAL
2016; 827 (1)
View details for DOI 10.3847/0004-637X/827/1/38
View details for Web of Science ID 000382009500038
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THE FIRST FERMI LAT SUPERNOVA REMNANT CATALOG
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2016; 224 (1)
View details for DOI 10.3847/0067-0049/224/1/8
View details for Web of Science ID 000377050200008
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Resolving the Extragalactic gamma-Ray Background above 50 GeV with the Fermi Large Area Telescope
PHYSICAL REVIEW LETTERS
2016; 116 (15)
Abstract
The Fermi Large Area Telescope (LAT) Collaboration has recently released a catalog of 360 sources detected above 50 GeV (2FHL). This catalog was obtained using 80 months of data re-processed with Pass 8, the newest event-level analysis, which significantly improves the acceptance and angular resolution of the instrument. Most of the 2FHL sources at high Galactic latitude are blazars. Using detailed Monte Carlo simulations, we measure, for the first time, the source count distribution, dN/dS, of extragalactic γ-ray sources at E>50 GeV and find that it is compatible with a Euclidean distribution down to the lowest measured source flux in the 2FHL (∼8×10^{-12} ph cm^{-2} s^{-1}). We employ a one-point photon fluctuation analysis to constrain the behavior of dN/dS below the source detection threshold. Overall, the source count distribution is constrained over three decades in flux and found compatible with a broken power law with a break flux, S_{b}, in the range [8×10^{-12},1.5×10^{-11}] ph cm^{-2} s^{-1} and power-law indices below and above the break of α_{2}∈[1.60,1.75] and α_{1}=2.49±0.12, respectively. Integration of dN/dS shows that point sources account for at least 86_{-14}^{+16}% of the total extragalactic γ-ray background. The simple form of the derived source count distribution is consistent with a single population (i.e., blazars) dominating the source counts to the minimum flux explored by this analysis. We estimate the density of sources detectable in blind surveys that will be performed in the coming years by the Cherenkov Telescope Array.
View details for DOI 10.1103/PhysRevLett.116.151105
View details for PubMedID 27127954
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Measurement of the high-energy gamma-ray emission from the Moon with the Fermi Large Area Telescope
PHYSICAL REVIEW D
2016; 93 (8)
View details for DOI 10.1103/PhysRevD.93.082001
View details for Web of Science ID 000373584900002
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SEARCH FOR GAMMA-RAY EMISSION FROM THE COMA CLUSTER WITH SIX YEARS OF FERMI-LAT DATA
ASTROPHYSICAL JOURNAL
2016; 819 (2)
View details for DOI 10.3847/0004-637X/819/2/149
View details for Web of Science ID 000372305700061
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2FHL: THE SECOND CATALOG OF HARD FERMI-LAT SOURCES
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2016; 222 (1)
View details for DOI 10.3847/0067-0049/222/1/5
View details for Web of Science ID 000368982300005
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MULTIWAVELENGTH EVIDENCE FOR QUASI-PERIODIC MODULATION IN THE GAMMA-RAY BLAZAR PG 1553+113
ASTROPHYSICAL JOURNAL LETTERS
2015; 813 (2)
View details for DOI 10.1088/2041-8205/813/2/L41
View details for Web of Science ID 000365035000019
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COMBINED MODELING OF ACCELERATION, TRANSPORT, AND HYDRODYNAMIC RESPONSE IN SOLAR FLARES. II. INCLUSION OF RADIATIVE TRANSFER WITH RADYN
ASTROPHYSICAL JOURNAL
2015; 813 (2)
View details for DOI 10.1088/0004-637X/813/2/133
View details for Web of Science ID 000365288900053
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ACCELERATION OF THERMAL PROTONS BY GENERIC PHENOMENOLOGICAL MECHANISMS
ASTROPHYSICAL JOURNAL
2015; 813 (1)
View details for DOI 10.1088/0004-637X/813/1/5
View details for Web of Science ID 000365284100005
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SEARCH FOR EXTENDED GAMMA-RAY EMISSION FROM THE VIRGO GALAXY CLUSTER WITH FERMI-LAT
ASTROPHYSICAL JOURNAL
2015; 812 (2)
View details for DOI 10.1088/0004-637X/812/2/159
View details for Web of Science ID 000365206600071
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Luminosity-time and luminosity-luminosity correlations for GRB prompt and afterglow plateau emissions
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2015; 451 (4): 3898-3908
View details for DOI 10.1093/mnras/stv1229
View details for Web of Science ID 000360846400038
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COSMOLOGICAL EVOLUTION OF LONG GAMMA-RAY BURSTS AND THE STAR FORMATION RATE
ASTROPHYSICAL JOURNAL
2015; 806 (1)
View details for DOI 10.1088/0004-637X/806/1/44
View details for Web of Science ID 000356810300044
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FIRST DETECTION OF > 100 MeV GAMMA-RAYS ASSOCIATED WITH A BEHIND-THE-LIMB SOLAR FLARE
ASTROPHYSICAL JOURNAL LETTERS
2015; 805 (2)
View details for DOI 10.1088/2041-8205/805/2/L15
View details for Web of Science ID 000356626900005
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SOLAR FLARE CHROMOSPHERIC LINE EMISSION: COMPARISON BETWEEN IBIS HIGH-RESOLUTION OBSERVATIONS AND RADIATIVE HYDRODYNAMIC SIMULATIONS
ASTROPHYSICAL JOURNAL
2015; 804 (1)
View details for DOI 10.1088/0004-637X/804/1/56
View details for Web of Science ID 000354189500056
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THE SPECTRUM AND MORPHOLOGY OF THE FERMI BUBBLES
ASTROPHYSICAL JOURNAL
2014; 793 (1)
View details for DOI 10.1088/0004-637X/793/1/64
View details for Web of Science ID 000341301700064
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IMPULSIVE AND LONG DURATION HIGH-ENERGY GAMMA-RAY EMISSION FROM THE VERY BRIGHT 2012 MARCH 7 SOLAR FLARES
ASTROPHYSICAL JOURNAL
2014; 789 (1)
View details for DOI 10.1088/0004-637X/789/1/20
View details for Web of Science ID 000338103400020
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INJECTION OF kappa-LIKE SUPRATHERMAL PARTICLES INTO DIFFUSIVE SHOCK ACCELERATION
ASTROPHYSICAL JOURNAL
2014; 788 (2)
View details for DOI 10.1088/0004-637X/788/2/142
View details for Web of Science ID 000337466200045
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HIGH-ENERGY GAMMA-RAY EMISSION FROM SOLAR FLARES: SUMMARY OF FERMI LARGE AREA TELESCOPE DETECTIONS AND ANALYSIS OF TWO M-CLASS FLARES
ASTROPHYSICAL JOURNAL
2014; 787 (1)
View details for DOI 10.1088/0004-637X/787/1/15
View details for Web of Science ID 000335924200015
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Determination of acceleration mechanism characteristics directly and nonparametrically from observations: Application to supernova remnants
PHYSICAL REVIEW D
2014; 89 (10)
View details for DOI 10.1103/PhysRevD.89.103007
View details for Web of Science ID 000335829600004
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GAMMA-RAY LUMINOSITY AND PHOTON INDEX EVOLUTION OF FSRQ BLAZARS AND CONTRIBUTION TO THE GAMMA-RAY BACKGROUND
ASTROPHYSICAL JOURNAL
2014; 786 (2)
View details for DOI 10.1088/0004-637X/786/2/109
View details for Web of Science ID 000335884500033
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Fermi-LAT Observations of the Gamma-Ray Burst GRB 130427A
SCIENCE
2014; 343 (6166): 42-47
Abstract
The observations of the exceptionally bright gamma-ray burst (GRB) 130427A by the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope provide constraints on the nature of these unique astrophysical sources. GRB 130427A had the largest fluence, highest-energy photon (95 GeV), longest γ-ray duration (20 hours), and one of the largest isotropic energy releases ever observed from a GRB. Temporal and spectral analyses of GRB 130427A challenge the widely accepted model that the nonthermal high-energy emission in the afterglow phase of GRBs is synchrotron emission radiated by electrons accelerated at an external shock.
View details for DOI 10.1126/science.1242353
View details for Web of Science ID 000329162000042
View details for PubMedID 24263133
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DETERMINATION OF STOCHASTIC ACCELERATION MODEL CHARACTERISTICS IN SOLAR FLARES
ASTROPHYSICAL JOURNAL
2013; 777 (1)
View details for DOI 10.1088/0004-637X/777/1/33
View details for Web of Science ID 000326147300033
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DETERMINATION OF THE INTRINSIC LUMINOSITY TIME CORRELATION IN THE X-RAY AFTERGLOWS OF GAMMA-RAY BURSTS
ASTROPHYSICAL JOURNAL
2013; 774 (2)
View details for DOI 10.1088/0004-637X/774/2/157
View details for Web of Science ID 000323888900066
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PLASMOID EJECTIONS AND LOOP CONTRACTIONS IN AN ERUPTIVE M7.7 SOLAR FLARE: EVIDENCE OF PARTICLE ACCELERATION AND HEATING IN MAGNETIC RECONNECTION OUTFLOWS
ASTROPHYSICAL JOURNAL
2013; 767 (2)
View details for DOI 10.1088/0004-637X/767/2/168
View details for Web of Science ID 000317346800071
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ON THE LACK OF TIME DILATION SIGNATURES IN GAMMA-RAY BURST LIGHT CURVES
ASTROPHYSICAL JOURNAL
2013; 765 (2)
View details for DOI 10.1088/0004-637X/765/2/116
View details for Web of Science ID 000315921500041
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THE RADIO AND OPTICAL LUMINOSITY EVOLUTION OF QUASARS. II. THE SDSS SAMPLE
ASTROPHYSICAL JOURNAL
2013; 764 (1)
View details for DOI 10.1088/0004-637X/764/1/43
View details for Web of Science ID 000314335200043
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Observational Aspects of Particle Acceleration in Large Solar Flares
SPACE SCIENCE REVIEWS
2012; 173 (1-4): 197-221
View details for DOI 10.1007/s11214-012-9897-x
View details for Web of Science ID 000310878100006
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Stochastic Acceleration by Turbulence
SPACE SCIENCE REVIEWS
2012; 173 (1-4): 535-556
View details for DOI 10.1007/s11214-012-9900-6
View details for Web of Science ID 000310878100017
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GeV OBSERVATIONS OF STAR-FORMING GALAXIES WITH THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL
2012; 755 (2)
View details for DOI 10.1088/0004-637X/755/2/164
View details for Web of Science ID 000307791400081
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FLUX AND PHOTON SPECTRAL INDEX DISTRIBUTIONS OF FERMI-LAT BLAZARS AND CONTRIBUTION TO THE EXTRAGALACTIC GAMMA-RAY BACKGROUND
ASTROPHYSICAL JOURNAL
2012; 753 (1)
View details for DOI 10.1088/0004-637X/753/1/45
View details for Web of Science ID 000305632500045
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IMPULSIVE PHASE CORONAL HARD X-RAY SOURCES IN AN X3.9 CLASS SOLAR FLARE
ASTROPHYSICAL JOURNAL
2012; 748 (1)
View details for DOI 10.1088/0004-637X/748/1/33
View details for Web of Science ID 000301347500033
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FERMI DETECTION OF gamma-RAY EMISSION FROM THE M2 SOFT X-RAY FLARE ON 2010 JUNE 12f
ASTROPHYSICAL JOURNAL
2012; 745 (2)
View details for DOI 10.1088/0004-637X/745/2/144
View details for Web of Science ID 000300326800042
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ON THE RADIO AND OPTICAL LUMINOSITY EVOLUTION OF QUASARS
ASTROPHYSICAL JOURNAL
2011; 743 (2)
View details for DOI 10.1088/0004-637X/743/2/104
View details for Web of Science ID 000298178400006
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Recent Advances in Understanding Particle Acceleration Processes in Solar Flares
SPACE SCIENCE REVIEWS
2011; 159 (1-4): 357-420
View details for DOI 10.1007/s11214-011-9803-y
View details for Web of Science ID 000295738400009
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DETECTION OF A SPECTRAL BREAK IN THE EXTRA HARD COMPONENT OF GRB 090926A
ASTROPHYSICAL JOURNAL
2011; 729 (2)
View details for DOI 10.1088/0004-637X/729/2/114
View details for Web of Science ID 000288608700037
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Sources of the radio background considered
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2010; 409 (3): 1172-1182
View details for DOI 10.1111/j.1365-2966.2010.17382.x
View details for Web of Science ID 000284854300025
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Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV
PHYSICAL REVIEW D
2010; 82 (9)
View details for DOI 10.1103/PhysRevD.82.092004
View details for Web of Science ID 000284402000002
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FERMI OBSERVATIONS OF HIGH-ENERGY GAMMA-RAY EMISSION FROM GRB 090217A
ASTROPHYSICAL JOURNAL LETTERS
2010; 717 (2): L127-L132
View details for DOI 10.1088/2041-8205/717/2/L127
View details for Web of Science ID 000279430700011
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GeV GAMMA-RAY FLUX UPPER LIMITS FROM CLUSTERS OF GALAXIES
ASTROPHYSICAL JOURNAL LETTERS
2010; 717 (1): L71-L78
View details for DOI 10.1088/2041-8205/717/1/L71
View details for Web of Science ID 000279430600015
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THE COSMIC RADIO BACKGROUND AND JET CONNECTION
International Meeting on High-Energy Phenomena in Relativistic Outflows II
WORLD SCIENTIFIC PUBL CO PTE LTD. 2010: 965–69
View details for DOI 10.1142/S0218271810016762
View details for Web of Science ID 000279140200045
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DERIVATION OF STOCHASTIC ACCELERATION MODEL CHARACTERISTICS FOR SOLAR FLARES FROM RHESSI HARD X-RAY OBSERVATIONS
ASTROPHYSICAL JOURNAL LETTERS
2010; 712 (2): L131-L134
View details for DOI 10.1088/2041-8205/712/2/L131
View details for Web of Science ID 000276556500002
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ON THE ENERGY SPECTRA OF GeV/TeV COSMIC RAY LEPTONS
ASTROPHYSICAL JOURNAL
2010; 710 (1): 236-247
View details for DOI 10.1088/0004-637X/710/1/236
View details for Web of Science ID 000273850800023
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IDENTIFICATION AND PROPERTIES OF THE PHOTOSPHERIC EMISSION IN GRB090902B
ASTROPHYSICAL JOURNAL LETTERS
2010; 709 (2): L172-L177
View details for DOI 10.1088/2041-8205/709/2/L172
View details for Web of Science ID 000274209300017
- Direct Determination of Accelerated Mechanism Characteristics in Solar Flares from RHESSI Observations AAS 2010; 21640403
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FERMI OBSERVATIONS OF GRB 090902B: A DISTINCT SPECTRAL COMPONENT IN THE PROMPT AND DELAYED EMISSION
ASTROPHYSICAL JOURNAL LETTERS
2009; 706 (1): L138-L144
View details for DOI 10.1088/0004-637X/706/1/L138
View details for Web of Science ID 000271533200029
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A limit on the variation of the speed of light arising from quantum gravity effects
NATURE
2009; 462 (7271): 331-334
Abstract
A cornerstone of Einstein's special relativity is Lorentz invariance-the postulate that all observers measure exactly the same speed of light in vacuum, independent of photon-energy. While special relativity assumes that there is no fundamental length-scale associated with such invariance, there is a fundamental scale (the Planck scale, l(Planck) approximately 1.62 x 10(-33) cm or E(Planck) = M(Planck)c(2) approximately 1.22 x 10(19) GeV), at which quantum effects are expected to strongly affect the nature of space-time. There is great interest in the (not yet validated) idea that Lorentz invariance might break near the Planck scale. A key test of such violation of Lorentz invariance is a possible variation of photon speed with energy. Even a tiny variation in photon speed, when accumulated over cosmological light-travel times, may be revealed by observing sharp features in gamma-ray burst (GRB) light-curves. Here we report the detection of emission up to approximately 31 GeV from the distant and short GRB 090510. We find no evidence for the violation of Lorentz invariance, and place a lower limit of 1.2E(Planck) on the scale of a linear energy dependence (or an inverse wavelength dependence), subject to reasonable assumptions about the emission (equivalently we have an upper limit of l(Planck)/1.2 on the length scale of the effect). Our results disfavour quantum-gravity theories in which the quantum nature of space-time on a very small scale linearly alters the speed of light.
View details for DOI 10.1038/nature08574
View details for Web of Science ID 000271899300039
View details for PubMedID 19865083
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COMBINED MODELING OF ACCELERATION, TRANSPORT, AND HYDRODYNAMIC RESPONSE IN SOLAR FLARES. I. THE NUMERICAL MODEL
ASTROPHYSICAL JOURNAL
2009; 702 (2): 1553-1566
View details for DOI 10.1088/0004-637X/702/2/1553
View details for Web of Science ID 000269245000061
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RELATIVE DISTRIBUTIONS OF FLUENCES OF He-3 AND He-4 IN SOLAR ENERGETIC PARTICLES
ASTROPHYSICAL JOURNAL
2009; 701 (1): 1-7
View details for DOI 10.1088/0004-637X/701/1/1
View details for Web of Science ID 000268341800001
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CASCADE AND DAMPING OF ALFVEN-CYCLOTRON FLUCTUATIONS: APPLICATION TO SOLAR WIND TURBULENCE
ASTROPHYSICAL JOURNAL
2009; 698 (1): 163-183
View details for DOI 10.1088/0004-637X/698/1/163
View details for Web of Science ID 000266373700013
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Fermi Observations of High-Energy Gamma-Ray Emission from GRB 080916C
SCIENCE
2009; 323 (5922): 1688-1693
Abstract
Gamma-ray bursts (GRBs) are highly energetic explosions signaling the death of massive stars in distant galaxies. The Gamma-ray Burst Monitor and Large Area Telescope onboard the Fermi Observatory together record GRBs over a broad energy range spanning about 7 decades of gammaray energy. In September 2008, Fermi observed the exceptionally luminous GRB 080916C, with the largest apparent energy release yet measured. The high-energy gamma rays are observed to start later and persist longer than the lower energy photons. A simple spectral form fits the entire GRB spectrum, providing strong constraints on emission models. The known distance of the burst enables placing lower limits on the bulk Lorentz factor of the outflow and on the quantum gravity mass.
View details for DOI 10.1126/science.1169101
View details for Web of Science ID 000264559800029
View details for PubMedID 19228997
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CONJUGATE HARD X-RAY FOOTPOINTS IN THE 2003 OCTOBER 29 X10 FLARE: UNSHEARING MOTIONS, CORRELATIONS, AND ASYMMETRIES
ASTROPHYSICAL JOURNAL
2009; 693 (1): 847-867
View details for DOI 10.1088/0004-637X/693/1/847
View details for Web of Science ID 000263903300071
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Particle acceleration by fast modes in solar flares
ASTROPHYSICAL JOURNAL
2008; 684 (2): 1461-1468
View details for Web of Science ID 000258889000056
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Heating and acceleration of intracluster medium electrons by turbulence
ASTROPHYSICAL JOURNAL
2008; 682 (1): 175-185
View details for Web of Science ID 000257834000014
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On the momentum diffusion of radiating ultrarelativistic electrons in a turbulent magnetic field
ASTROPHYSICAL JOURNAL
2008; 681 (2): 1725-1744
View details for Web of Science ID 000257516000080
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Double coronal hard and soft X-ray source observed by RHESSI: Evidence for magnetic reconnection and particle acceleration in solar flares
ASTROPHYSICAL JOURNAL
2008; 676 (1): 704-716
View details for Web of Science ID 000254086100054
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Particle acceleration mechanisms
SPACE SCIENCE REVIEWS
2008; 134 (1-4): 207-227
View details for DOI 10.1007/s11214-008-9315-6
View details for Web of Science ID 000254262200011
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Equilibration processes in the warm-hot intergalactic medium
SPACE SCIENCE REVIEWS
2008; 134 (1-4): 141-153
View details for DOI 10.1007/s11214-008-9309-4
View details for Web of Science ID 000254262200008
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Nonthermal radiation mechanisms
SPACE SCIENCE REVIEWS
2008; 134 (1-4): 191-206
View details for DOI 10.1007/s11214-008-9327-2
View details for Web of Science ID 000254262200010
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Correlation between flux and spectral index during flares in Sagittarius A
ASTROPHYSICAL JOURNAL
2007; 661 (2): 863-874
View details for Web of Science ID 000246947100019
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Analysis and interpretation of hard X-ray emission from the bullet cluster (1ES 0657-558), the most distant cluster of galaxies observed by RXTE
ASTROPHYSICAL JOURNAL
2006; 652 (2): 948-954
View details for Web of Science ID 000242530100010
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Rhessi observation of chromospheric evaporation
ASTROPHYSICAL JOURNAL
2006; 649 (2): 1124-1139
View details for Web of Science ID 000240854200051
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A testable stochastic acceleration model for flares in Sagittarius A
ASTROPHYSICAL JOURNAL
2006; 648 (2): 1020-1025
View details for Web of Science ID 000240403600023
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Stochastic acceleration in the galactic center HESS source
ASTROPHYSICAL JOURNAL
2006; 647 (2): 1099-1105
View details for Web of Science ID 000239830000031
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Damping of magnetohydrodynamic turbulence in solar flares
ASTROPHYSICAL JOURNAL
2006; 644 (1): 603-612
View details for Web of Science ID 000238339200055
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Evolution of the loop-top source of solar flares: Heating and cooling processes
ASTROPHYSICAL JOURNAL
2006; 638 (2): 1140-1153
View details for Web of Science ID 000235425700051
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Stochastic electron acceleration during the near-infrared and X-ray flares in Sagittarius A*
ASTROPHYSICAL JOURNAL
2006; 636 (2): 798-803
View details for Web of Science ID 000234469400018
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Stochastic acceleration of He-3 and He-4 in solar flares by parallel- propagating plasma waves: General results
ASTROPHYSICAL JOURNAL
2006; 636 (1): 462-474
View details for Web of Science ID 000234288800040
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Total galaxy magnitudes and effective radii from Petrosian magnitudes and radii
ASTRONOMICAL JOURNAL
2005; 130 (4): 1535-1544
View details for Web of Science ID 000232270200015
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Non-thermal activity and particle acceleration in clusters of galaxies
25th General Assembly of the International-Astronomical-Union
ASTRONOMICAL SOC PACIFIC. 2005: 317–321
View details for Web of Science ID 000240768700094
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Stochastic acceleration of He-3 and He-4 by parallel propagating plasma waves
ASTROPHYSICAL JOURNAL
2004; 613 (1): L81-L84
View details for Web of Science ID 000224074700021
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Electron acceleration around the supermassive black hole at the galactic center
ASTROPHYSICAL JOURNAL
2004; 611 (2): L101-L104
View details for Web of Science ID 000223403600009
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RHESSI OBSERVATIONS OF A SIMPLE LARGE X-RAY FLARE ON 2003 NOVEMBER 3
ASTROPHYSICAL JOURNAL
2004; 611 (1)
View details for DOI 10.1086/423371
View details for Web of Science ID 000208400000014
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Stochastic acceleration of electrons and protons. I. Acceleration by parallel-propagating waves
ASTROPHYSICAL JOURNAL
2004; 610 (1): 550-571
View details for Web of Science ID 000222699700052
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GRB 021004: A massive progenitor star surrounded by shells
ASTROPHYSICAL JOURNAL
2003; 588 (1): 387-399
View details for Web of Science ID 000182451800032
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Nonthermal radiation and acceleration of electrons in clusters of galaxies
Conference on Matter and Energy in Clusters of Galaxies
ASTRONOMICAL SOC PACIFIC. 2003: 337–346
View details for Web of Science ID 000186286300026
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Gamma-ray burst spectra and light curves as signatures of a relativistically expanding plasma
ASTROPHYSICAL JOURNAL
2002; 578 (1): 290-303
View details for Web of Science ID 000178301500024
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Loop top hard X-ray emission in solar flares: Images and statistics
ASTROPHYSICAL JOURNAL
2002; 569 (1): 459-473
View details for Web of Science ID 000174876800040
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Interpreting the behavior of time-resolved gamma-ray burst spectra
ASTROPHYSICAL JOURNAL
2002; 565 (1): 182-194
View details for Web of Science ID 000173507200017
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Looptop and footpoint impulsive hard X-rays and stochastic electron acceleration in flares
Yohkoh 10th Anniversary Meeting on Multi-Wavelength Observations of Coronal Structure and Dynamics
PERGAMON-ELSEVIER SCIENCE LTD. 2002: 361–366
View details for Web of Science ID 000179468700094
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New statistical methods for analysis of large surveys: Distributions and correlations
IAU Colloquium on AGN Surveys
ASTRONOMICAL SOC PACIFIC. 2002: 389–397
View details for Web of Science ID 000182119900073
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On the nonthermal emission and acceleration of electrons in coma and other clusters of galaxies
ASTROPHYSICAL JOURNAL
2001; 557 (2): 560-572
View details for Web of Science ID 000170704800007
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Synchrotron radiation as the source of gamma-ray burst spectra
ASTROPHYSICAL JOURNAL
2000; 543 (2): 722-732
View details for Web of Science ID 000165599300018
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On the intrinsic and cosmological signatures in gamma-ray burst time profiles: Time dilation
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2000; 131 (1): 21-38
View details for Web of Science ID 000166036100002
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Properties of gamma-ray burst time profiles using pulse decomposition analysis
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2000; 131 (1): 1-19
View details for Web of Science ID 000166036100001
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Cosmological versus intrinsic: The correlation between intensity and the peak of the vF(v) spectrum of gamma-ray bursts
ASTROPHYSICAL JOURNAL
2000; 534 (1): 227-238
View details for Web of Science ID 000087183300021
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Synchrotron radiation as the source of GRB spectra, part I: Theory
5th Huntsville Symposium on Gamma-Ray Burst
AMER INST PHYSICS. 2000: 465–469
View details for Web of Science ID 000166661400087
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Cosmological signatures in intensity and break energy correlations
5th Huntsville Symposium on Gamma-Ray Burst
AMER INST PHYSICS. 2000: 145–149
View details for Web of Science ID 000166661400028
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Spatial and spectral structure of hard X-rays and electron acceleration
Conference on High Energy Solar Physics - Anticipating HESSI
ASTRONOMICAL SOC PACIFIC. 2000: 215–220
View details for Web of Science ID 000089621000031
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Synchrotron emission as the source of GRB spectra, Part II: Observations
5th Huntsville Symposium on Gamma-Ray Burst
AMER INST PHYSICS. 2000: 155–159
View details for Web of Science ID 000166661400030
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On the spatial distribution of hard X-rays from solar flare loops
ASTROPHYSICAL JOURNAL
1999; 527 (2): 945-957
View details for Web of Science ID 000084561700038
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Nonparametric methods for doubly truncated data
JOURNAL OF THE AMERICAN STATISTICAL ASSOCIATION
1999; 94 (447): 824-834
View details for Web of Science ID 000082756400025
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The evolution and luminosity function of quasars from complete optical surveys
ASTROPHYSICAL JOURNAL
1999; 518 (1): 32-43
View details for Web of Science ID 000081158600003
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Stochastic acceleration of electrons by plasma waves. III. Waves propagating perpendicular to the magnetic field
ASTROPHYSICAL JOURNAL
1999; 515 (2): 873-881
View details for Web of Science ID 000080527500040
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Distribution of spectral characteristics and the cosmological evolution of gamma-ray bursts
ASTROPHYSICAL JOURNAL
1999; 511 (2): 550-561
View details for Web of Science ID 000079158100003
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The evolution and luminosity function of quasars
194th Symposium of the International-Astronomical-Union
ASTRONOMICAL SOC PACIFIC. 1999: 105–12
View details for Web of Science ID 000175726500018
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Cosmological signatures in temporal and spectral characteristics of gamma-ray bursts
Conference on Gamma-Ray Bursts - The First Three Minutes
ASTRONOMICAL SOC PACIFIC. 1999: 235–252
View details for Web of Science ID 000085157500016
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New and old tests of cosmological models and the evolution of galaxies
ASTROPHYSICAL JOURNAL
1998; 507 (1): 1-15
View details for Web of Science ID 000077779400001
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Stochastic acceleration of low-energy electrons in plasmas with finite temperature
ASTROPHYSICAL JOURNAL
1998; 495 (1): 377-384
View details for Web of Science ID 000072359100033
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Distribution of fluences versus peak fluxes and the cosmological density evolution of the rate of GRBs
4th Huntsville Gamma-Ray Burst Symposium
AMER INST PHYSICS. 1998: 35–39
View details for Web of Science ID 000075012200007
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The extent of the spectral bias in BATSE: The true distribution of the nu F-nu peak energy
4th Huntsville Gamma-Ray Burst Symposium
AMER INST PHYSICS. 1998: 67–71
View details for Web of Science ID 000075012200014
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Stochastic acceleration and photon emission in electron-dominated solar flares
ASTROPHYSICAL JOURNAL
1997; 489 (1): 358-366
View details for Web of Science ID A1997YE13900032
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Stochastic acceleration of low-energy electrons in cold plasmas
ASTROPHYSICAL JOURNAL
1997; 482 (2): 774-781
View details for Web of Science ID A1997XF54100018
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Time dilation of BATSE gamma-ray bursts
ASTROPHYSICAL JOURNAL
1997; 474 (1): 37-46
View details for Web of Science ID A1997WA68200004
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Distributions of peak flux and duration for gamma-ray bursts
ASTROPHYSICAL JOURNAL
1996; 470 (1): 479-492
View details for Web of Science ID A1996VL72300035
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The fluence distribution of gamma-ray bursts
ASTROPHYSICAL JOURNAL
1996; 467 (1): L29-L32
View details for Web of Science ID A1996VB70200008
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Fokker-Planck equations of stochastic acceleration: A study of numerical methods
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
1996; 103 (1): 255-267
View details for Web of Science ID A1996TV29000012
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Gravitational lens models of arcs in Abell 2218
ASTROPHYSICAL JOURNAL
1996; 458 (1): 57-?
View details for Web of Science ID A1996TT07500005
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On the distributions of flux and duration of gamma-ray bursts
Workshop on High Velocity Neutron Stars and Gamma-Ray Bursts
AIP PRESS. 1996: 170–74
View details for Web of Science ID A1996BF72X00024
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Flux-duration correlations and cosmological time dilation
3rd Huntsville Symposium on Gamma-Ray Bursts
AIP PRESS. 1996: 82–86
View details for Web of Science ID A1996BH28Y00015
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Luminosity function and cosmological evolution of gamma-ray bursts
3rd Huntsville Symposium on Gamma-Ray Bursts
AIP PRESS. 1996: 306–10
View details for Web of Science ID A1996BH28Y00055
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Acceleration and heating by turbulence in flares
High Energy Solar Physics Workshop
AIP PRESS. 1996: 445–49
View details for Web of Science ID A1996BF93Y00045
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Threshold effects on gamma-ray burst distributions
3rd Huntsville Symposium on Gamma-Ray Bursts
AIP PRESS. 1996: 462–66
View details for Web of Science ID A1996BH28Y00088
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THE EVOLUTION OF GAMMA-RAY LOUD ACTIVE GALACTIC NUCLEI
ASTROPHYSICAL JOURNAL
1995; 452 (1): 156-163
View details for Web of Science ID A1995RX15700013
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TESTING ISOTROPY VERSUS CLUSTERING OF GAMMA-RAY BURSTS
ASTROPHYSICAL JOURNAL
1995; 449 (1): 216-223
View details for Web of Science ID A1995RM55500024
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THE NEUPERT EFFECT AND THE CHROMOSPHERIC EVAPORATION MODEL FOR SOLAR-FLARES
ASTROPHYSICAL JOURNAL
1995; 448 (2): 915-924
View details for Web of Science ID A1995RK72200044
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FOKKER-PLANCK EQUATIONS OF STOCHASTIC ACCELERATION - GREENS-FUNCTIONS AND BOUNDARY-CONDITIONS
ASTROPHYSICAL JOURNAL
1995; 446 (2): 699-716
View details for Web of Science ID A1995RC75500025
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ON THE CORRELATION OF ANGULAR POSITION WITH TIME OF OCCURRENCE OF GAMMA-RAY BURSTS
ASTROPHYSICAL JOURNAL
1995; 441 (1): L37-L38
View details for Web of Science ID A1995QJ10300010
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GAMMA-RAY EMISSION AND ELECTRON ACCELERATION IN SOLAR-FLARES
ASTROPHYSICAL JOURNAL
1994; 434 (2): 747-755
View details for Web of Science ID A1994PL83700037
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SURVIVAL ANALYSIS OF THE GAMMA-RAY BURST DATA
JOURNAL OF THE AMERICAN STATISTICAL ASSOCIATION
1994; 89 (426): 452-462
View details for Web of Science ID A1994NN15500015
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THE DYNAMICS OF CHARGED-PARTICLES IN TURBULENT ASTROPHYSICAL PLASMAS
ASTROPHYSICAL JOURNAL
1994; 421 (2): 550-560
View details for Web of Science ID A1994MU54200013
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DO GAMMA-RAY BURSTS ORIGINATE FROM AN EXTENDED GALACTIC HALO OF HIGH-VELOCITY NEUTRON-STARS
International-Astronomical-Union Colloquium 142
UNIV CHICAGO PRESS. 1994: 893–97
View details for Web of Science ID A1994MT95400054
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ACCELERATION OF ELECTRONS IN SOLAR-FLARES
Workshop on High-Energy Solar Phenomena - A New Era of Spacecraft Measurements
AIP PRESS. 1994: 162–70
View details for Web of Science ID A1994BA54B00023
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THE SLOPE OF THE LOGN-LOGS DISTRIBUTION FOR BATSE GAMMA-RAY BURSTS
2nd Huntsville Gamma-Ray Workshop
AIP PRESS. 1994: 84–87
View details for Web of Science ID A1994BB12A00017
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COMPARING AND COMBINING THE GAMMA-RAY BURSTS FROM SMM, SIGNE AND BATSE
2nd Huntsville Gamma-Ray Workshop
AIP PRESS. 1994: 88–92
View details for Web of Science ID A1994BB12A00018
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DISTRIBUTION OF PEAK COUNTS AND DURATION OF GAMMA-RAY BURSTS
2nd Huntsville Gamma-Ray Workshop
AIP PRESS. 1994: 93–97
View details for Web of Science ID A1994BB12A00019
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SUBMILLIMETER AND FAR-INFRARED EMISSION FROM SOLAR-FLARES
154th Symposium of the International-Astronomical-Union - 1st International Meeting devoted to Infrared Physics
KLUWER ACADEMIC PUBL. 1994: 103–12
View details for Web of Science ID A1994BZ76S00014
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SMOOTHED NONPARAMETRIC-ESTIMATION OF THE LUMINOSITY FUNCTION FOR FLUX-LIMITED SAMPLES
ASTROPHYSICAL JOURNAL
1993; 416 (2): 450-457
View details for Web of Science ID A1993MA82600006
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STATISTICS OF ARCS IN CLUSTERS OF GALAXIES
ASTROPHYSICAL JOURNAL
1993; 413 (1): 18-38
View details for Web of Science ID A1993LP77100004
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THE DISTRIBUTION OF FLARE PARAMETERS AND IMPLICATIONS FOR CORONAL HEATING
ASTROPHYSICAL JOURNAL
1993; 412 (1): 401-409
View details for Web of Science ID A1993LM21400034
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INTERPRETATION OF GAMMA-RAY BURST SOURCE COUNT STATISTICS
ASTROPHYSICAL JOURNAL
1993; 402 (2): L33-L36
View details for Web of Science ID A1993KG27300002
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A SIMPLE TEST OF INDEPENDENCE FOR TRUNCATED DATA WITH APPLICATIONS TO REDSHIFT SURVEYS
ASTROPHYSICAL JOURNAL
1992; 399 (2): 345-352
View details for Web of Science ID A1992JV80600002
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STOCHASTIC ACCELERATION OF ELECTRONS .1. EFFECTS OF COLLISIONS IN SOLAR-FLARES
ASTROPHYSICAL JOURNAL
1992; 398 (1): 350-358
View details for Web of Science ID A1992JQ39700031
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LUMINOSITY FUNCTION OF FLUX-LIMITED SAMPLES
CROSS-DISCIPLINARY CONF ON STATISTICAL CHALLENGES IN MODERN ASTRONOMY
SPRINGER-VERLAG. 1992: 173–194
View details for Web of Science ID A1992BX28R00019
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CENTER-TO-LIMB VARIATIONS OF CHARACTERISTICS OF SOLAR-FLARE HARD X-RAY AND GAMMA-RAY EMISSION
ASTROPHYSICAL JOURNAL
1991; 379 (1): 381-391
View details for Web of Science ID A1991GF74900035
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EVOLUTION OF THE LUMINOSITY FUNCTION OF QUASAR ACCRETION DISKS
ASTROPHYSICAL JOURNAL
1991; 372 (2): L63-L66
View details for Web of Science ID A1991FK23800004
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EFFECTS OF COULOMB COLLISIONS ON CYCLOTRON MASER AND PLASMA-WAVE GROWTH IN MAGNETIC LOOPS
ASTROPHYSICAL JOURNAL
1990; 365 (2): 778-788
View details for Web of Science ID A1990EL77300036
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THE HARD X-RAYS AND GAMMA-RAYS FROM SOLAR-FLARES
ASTROPHYSICAL JOURNAL
1990; 359 (2): 541-549
View details for Web of Science ID A1990DT68100028
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THE BEHAVIOR OF BEAMS OF RELATIVISTIC NONTHERMAL ELECTRONS UNDER THE INFLUENCE OF COLLISIONS AND SYNCHROTRON LOSSES
ASTROPHYSICAL JOURNAL
1990; 359 (2): 524-540
View details for Web of Science ID A1990DT68100027
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STATISTICAL STUDY OF THE CORRELATION OF HARD X-RAY AND TYPE-III RADIO-BURSTS IN SOLAR-FLARES
ASTROPHYSICAL JOURNAL
1990; 358 (2): 644-653
View details for Web of Science ID A1990DP60100024
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STATISTICAL AND PHYSICAL EVOLUTION OF QUASI-STELLAR OBJECTS
ASTROPHYSICAL JOURNAL
1990; 357 (2): 326-337
View details for Web of Science ID A1990DL48300005
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NUMERICAL-SOLUTION OF THE TIME-DEPENDENT KINETIC-EQUATION FOR ELECTRONS IN MAGNETIZED PLASMA
ASTROPHYSICAL JOURNAL
1990; 354 (2): 726-734
View details for Web of Science ID A1990DC92700030
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THE RELATIVE TIMING OF MICROWAVES AND X-RAYS FROM SOLAR-FLARES
ASTROPHYSICAL JOURNAL
1990; 354 (2): 735-744
View details for Web of Science ID A1990DC92700031
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GRAVITATIONAL LENS MODELS OF ARCS IN CLUSTERS
ASTROPHYSICAL JOURNAL
1990; 350 (1): 23-35
View details for Web of Science ID A1990CX99500002
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ACCELERATION, TRANSPORT OF AND RADIATION BY ELECTRONS IN IMPULSIVE PHASE OF FLARES
142ND SYMP OF THE INTERNATIONAL ASTRONOMICAL UNION : BASIC PLASMA PROCESSES ON THE SUN
KLUWER ACADEMIC PUBL. 1990: 391–402
View details for Web of Science ID A1990BS41K00066
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ACCELERATION, TRANSPORT OF AND RADIATION BY ELECTRONS IN IMPULSIVE PHASE OF FLARES
IAU SYMPOSIA
1990: 391-402
View details for Web of Science ID A1990ET89400066
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THE RATIO OF MICROWAVES TO X-RAYS IN SOLAR-FLARES - THE CASE FOR THE THICK-TARGET MODEL
ASTROPHYSICAL JOURNAL
1989; 338 (2): 1122-1130
View details for Web of Science ID A1989T462300043
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COSMOLOGICAL PARAMETERS AND EVOLUTION OF THE GALAXY LUMINOSITY FUNCTION
ASTROPHYSICAL JOURNAL
1989; 337 (2): L65-L68
View details for Web of Science ID A1989T073600001
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QUASAR AND AGN EVOLUTION
134TH SYMP OF THE INTERNATIONAL ASTRONOMICAL UNION ON ACTIVE GALACTIC NUCLEI
KLUWER ACADEMIC PUBL. 1989: 59–61
View details for Web of Science ID A1989BQ61Y00015
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LUMINOUS ARCS IN CLUSTERS OF GALAXIES
ASTROPHYSICAL JOURNAL
1989; 336 (1): 1-?
View details for Web of Science ID A1989R560300001
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QUASAR AND AGN EVOLUTION
IAU SYMPOSIA
1989: 59-61
View details for Web of Science ID A1989DB06500015
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ACCRETION-DISK MODELING OF THE UV SPECTRUM OF QUASARS
ASTROPHYSICAL JOURNAL
1988; 329 (1): L11-L16
View details for Web of Science ID A1988N518100003
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RAPID TEMPORAL EVOLUTION OF RADIATION FROM NONTHERMAL ELECTRONS IN SOLAR-FLARES
ASTROPHYSICAL JOURNAL
1988; 327 (1): 405-416
View details for Web of Science ID A1988M522700041
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GIANT LUMINOUS ARCS IN CLUSTERS OF GALAXIES
IAU SYMPOSIA
1988: 467-469
View details for Web of Science ID A1988EE45000063
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GENERATION OF PLASMA-WAVES BY THICK-TARGET ELECTRON-BEAMS, AND THE EXPECTED RADIATION SIGNATURE
ASTROPHYSICAL JOURNAL
1987; 321 (2): 721-734
View details for Web of Science ID A1987K211000009
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ANALYTIC AND NUMERICAL-CALCULATIONS OF QUANTUM SYNCHROTRON SPECTRA FROM RELATIVISTIC ELECTRON DISTRIBUTIONS
ASTROPHYSICAL JOURNAL
1987; 320 (2): 703-713
View details for Web of Science ID A1987K101100029
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DIRECTIVITY OF BREMSSTRAHLUNG RADIATION FROM RELATIVISTIC BEAMS AND THE GAMMA-RAYS FROM SOLAR-FLARES
ASTROPHYSICAL JOURNAL
1985; 299 (2): 987-993
View details for Web of Science ID A1985AYB1900041
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THE INTERPRETATION OF HARD X-RAY-POLARIZATION MEASUREMENTS IN SOLAR-FLARES
SOLAR PHYSICS
1985; 96 (2): 331-337
View details for Web of Science ID A1985ALL1800009
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HIGH-ENERGY THERMAL SYNCHROTRON EMISSION
ASTROPHYSICAL JOURNAL
1985; 296 (1): 65-68
View details for Web of Science ID A1985APW6900007
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THE IMPOSSIBILITY OF A BOUNCING UNIVERSE - REPLY
NATURE
1983; 302 (5908): 506-507
View details for Web of Science ID A1983QJ97000033
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EMISSION, ABSORPTION, AND POLARIZATION OF GYROSYNCHROTRON RADIATION OF MILDLY RELATIVISTIC-PARTICLES
PHYSICS OF FLUIDS
1983; 26 (10): 3023-3028
View details for Web of Science ID A1983RM89600035
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CORRELATION OF HARD X-RAY AND TYPE-III BURSTS IN SOLAR-FLARES
SOLAR PHYSICS
1983; 87 (1): 165-175
View details for Web of Science ID A1983RG99000014
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THE IMPULSIVE PHASE OF SOLAR-FLARES .2. CHARACTERISTICS OF THE HARD X-RAYS
ASTROPHYSICAL JOURNAL
1983; 269 (2): 715-727
View details for Web of Science ID A1983QV03100035
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STRUCTURE OF THE IMPULSIVE PHASE OF SOLAR-FLARES FROM MICROWAVE OBSERVATIONS
ASTROPHYSICAL JOURNAL
1982; 255 (1): L85-L89
View details for Web of Science ID A1982NK87800017
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PHASE-TRANSITIONS AND DYNAMICS OF THE UNIVERSE
NATURE
1982; 298 (5877): 805-808
View details for Web of Science ID A1982PC83000024
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SYNCHROTRON EMISSIVITY FROM MILDLY RELATIVISTIC-PARTICLES
ASTROPHYSICAL JOURNAL
1981; 251 (2): 727-738
View details for Web of Science ID A1981MZ69400040
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IMPULSIVE PHASE OF SOLAR-FLARES .1. CHARACTERISTICS OF HIGH-ENERGY ELECTRONS
ASTROPHYSICAL JOURNAL
1981; 251 (2): 781-791
View details for Web of Science ID A1981MZ69400044
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STUDY OF THE SPECTRUM BEYOND 200 KEV OF 2ND-STAGE SOLAR-FLARE X-RAY-EMISSION
ASTROPHYSICAL JOURNAL
1980; 235 (3): 1047-1054
View details for Web of Science ID A1980JH86600038
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RADIATIVE-TRANSFER IN DUSTY NEBULAE .3. THE EFFECTS OF DUST ALBEDO
ASTROPHYSICAL JOURNAL
1980; 241 (3): 1094-1106
View details for Web of Science ID A1980KX03700029
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IMPULSIVE SOLAR X-RAY BURSTS .3. POLARIZATION, DIRECTIVITY, AND SPECTRUM OF REFLECTED AND TOTAL BREMSSTRAHLUNG RADIATION FROM A BEAM OF ELECTRONS DIRECTED TOWARD PHOTOSPHERE
ASTROPHYSICAL JOURNAL
1977; 215 (2): 666-676
View details for Web of Science ID A1977DM50300033
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APPROXIMATE SOLUTIONS OF RADIATIVE-TRANSFER IN DUSTY NEBULAE .2. HYDROGEN AND HELIUM
ASTROPHYSICAL JOURNAL
1976; 208 (2): 354-364
View details for Web of Science ID A1976CD78000011
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SURFACE BRIGHTNESS AND EVOLUTION OF GALAXIES
ASTROPHYSICAL JOURNAL
1976; 210 (2): L53-L57
View details for Web of Science ID A1976CP17200002
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SURFACE BRIGHTNESS AND EVOLUTION OF GALAXIES
ASTROPHYSICAL JOURNAL
1976; 209 (1): L1-L5
View details for Web of Science ID A1976CF36200001
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PRODUCTION OF HARD X-RAYS IN A PLASMA FOCUS
PHYSICS OF FLUIDS
1975; 18 (5): 547-551
View details for Web of Science ID A1975AB60800008
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IMPULSIVE SOLAR X-RAY BURSTS .2. STATISTICAL CORRELATION OF OBSERVATIONS WITH SOLAR LONGITUDE
ASTROPHYSICAL JOURNAL
1975; 197 (1): 235-239
View details for Web of Science ID A1975W248900026
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EFFECTS OF PRIMORDIAL FLUCTUATIONS ON ABUNDANCES OF LIGHT ELEMENTS
ASTROPHYSICAL JOURNAL
1975; 197 (2): 281-284
View details for Web of Science ID A1975W285700002
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OPTICAL RADIATION FROM CRAB PULSAR
ASTROPHYSICAL JOURNAL
1975; 196 (1): 73-82
View details for Web of Science ID A1975V792400005
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APPROXIMATE SOLUTIONS OF RADIATIVE-TRANSFER IN DUSTY NEBULAE .1. PURE HYDROGEN NEBULAE
ASTROPHYSICAL JOURNAL
1975; 196 (3): 733-744
View details for Web of Science ID A1975W091500011
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ARE QUASARS DUSTY
ASTROPHYSICAL JOURNAL
1974; 189 (1): 17-21
View details for Web of Science ID A1974S691400003
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HUBBLE RELATION FOR NONSTANDARD CANDLES AND ORIGIN OF REDSHIFT OF QUASARS
ASTROPHYSICAL JOURNAL
1974; 188 (3): 443-449
View details for Web of Science ID A1974S647600001
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EFFECT OF INELASTIC ELECTRON-ATOM COLLISIONS ON BALMER DECREMENT
ASTROPHYSICAL JOURNAL
1974; 192 (1): 199-205
View details for Web of Science ID A1974U037400024
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LUMINOSITY FUNCTION OF QUASARS AND ITS EVOLUTION - COMPARISON OF OPTICALLY SELECTED QUASARS AND QUASARS FOUND IN RADIO CATALOGS
ASTROPHYSICAL JOURNAL
1973; 183 (2): 359-381
View details for Web of Science ID A1973Q319900001
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FLUX-DENSITY-SPECTRAL-INDEX RELATION OF EXTRAGALACTIC RADIO-SOURCES
ASTROPHYSICAL JOURNAL
1973; 186 (2): 403-419
View details for Web of Science ID A1973R583000001
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INTERPRETATION OF FAR INFRARED-EMISSION FROM INTERSTELLAR GRAINS
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
1973; 164 (3): 295-302
View details for Web of Science ID A1973R060100007
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IMPULSIVE SOLAR X-RAY BURSTS - BREMSSTRAHLUNG RADIATION FROM A BEAM OF ELECTRONS IN SOLAR CHROMOSPHERE AND TOTAL ENERGY OF SOLAR-FLARES
ASTROPHYSICAL JOURNAL
1973; 186 (1): 291-304
View details for Web of Science ID A1973R378700026
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SYNCHROTRON SOURCES .1. PULSARS AND COMPACT EXTRAGALACTIC OBJECTS
ASTROPHYSICAL JOURNAL
1973; 183 (2): 611-623
View details for Web of Science ID A1973Q319900019