Academic Appointments


Honors & Awards


  • NASA Medal for Exceptional Scientific Achievement, NASA (2007)

Professional Education


  • Ph.D., University of Arizona, Planetary Science (1990)
  • B.S., California Institute of Technology, Geophysics and Planetary Science (1984)

2016-17 Courses


All Publications


  • Discovery and spectroscopy of the young jovian planet 51 Eri b with the Gemini Planet Imager SCIENCE Macintosh, B., Graham, J. R., Barman, T., De Rosa, R. J., Konopacky, Q., Marley, M. S., Marois, C., Nielsen, E. L., Pueyo, L., Rajan, A., Rameau, J., Saumon, D., Wang, J. J., Patience, J., Ammons, M., ARRIAGA, P., Artigau, E., Beckwith, S., Brewster, J., Bruzzone, S., Bulger, J., Burningham, B., Burrows, A. S., Chen, C., Chiang, E., Chilcote, J. K., DAWSON, R. I., Dong, R., Doyon, R., Draper, Z. H., Duchene, G., Esposito, T. M., Fabrycky, D., Fitzgerald, M. P., Follette, K. B., Fortney, J. J., Gerard, B., GOODSELL, S., Greenbaum, A. Z., Hibon, P., Hinkley, S., Cotten, T. H., Hung, L., Ingraham, P., Johnson-Groh, M., Kalas, P., LaFreniere, D., Larkin, J. E., Lee, J., Line, M., Long, D., Maire, J., Marchis, F., Matthews, B. C., Max, C. E., Metchev, S., Millar-Blanchaer, M. A., Mittal, T., Morley, C. V., Morzinski, K. M., Murray-Clay, R., Oppenheimer, R., Palmer, D. W., Patel, R., Perrin, M. D., Poyneer, L. A., Rafikov, R. R., Rantakyroe, F. T., Rice, E. L., Rojo, P., Rudy, A. R., Ruffio, J., Ruiz, M. T., Sadakuni, N., Saddlemyer, L., Salama, M., Savransky, D., Schneider, A. C., Sivaramakrishnan, A., Song, I., Soummer, R., Thomas, S., Vasisht, G., Wallace, J. K., Ward-Duong, K., Wiktorowicz, S. J., Wolff, S. G., Zuckerman, B. 2015; 350 (6256): 64-67

    Abstract

    Directly detecting thermal emission from young extrasolar planets allows measurement of their atmospheric compositions and luminosities, which are influenced by their formation mechanisms. Using the Gemini Planet Imager, we discovered a planet orbiting the ~20-million-year-old star 51 Eridani at a projected separation of 13 astronomical units. Near-infrared observations show a spectrum with strong methane and water-vapor absorption. Modeling of the spectra and photometry yields a luminosity (normalized by the luminosity of the Sun) of 1.6 to 4.0 × 10(-6) and an effective temperature of 600 to 750 kelvin. For this age and luminosity, "hot-start" formation models indicate a mass twice that of Jupiter. This planet also has a sufficiently low luminosity to be consistent with the "cold-start" core-accretion process that may have formed Jupiter.

    View details for DOI 10.1126/science.aac5891

    View details for Web of Science ID 000362098300045

  • THE FIRST H-BAND SPECTRUM OF THE GIANT PLANET beta PICTORIS b ASTROPHYSICAL JOURNAL LETTERS Chilcote, J., Barman, T., Fitzgerald, M. P., Graham, J. R., Larkin, J. E., Macintosh, B., Bauman, B., Burrows, A. S., Cardwell, A., De Rosa, R. J., Dillon, D., Doyon, R., Dunn, J., Erikson, D., Gavel, D., Goodsell, S. J., Hartung, M., Hibon, P., Ingraham, P., Kalas, P., Konopacky, Q., Maire, J., Marchis, F., Marley, M. S., Marois, C., Millar-Blanchaer, M., Morzinski, K., Norton, A., Oppenheimer, R., Palmer, D., Patience, J., Perrin, M., Poyneer, L., Pueyo, L., Rantakyroe, F. T., Sadakuni, N., Saddlemyer, L., Savransky, D., Serio, A., Sivaramakrishnan, A., Song, I., Soummer, R., Thomas, S., Wallace, J. K., Wiktorowicz, S., Wolff, S. 2015; 798 (1)
  • On the Cool Side: Modeling the Atmospheres of Brown Dwarfs and Giant Planets ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, VOL 53 Marley, M. S., Robinson, T. D. 2015; 53: 279-323
  • GEMINI PLANET IMAGER SPECTROSCOPY OF THE HR 8799 PLANETS c AND d ASTROPHYSICAL JOURNAL LETTERS Ingraham, P., Marley, M. S., Saumon, D., Marois, C., Macintosh, B., Barman, T., Bauman, B., Burrows, A., Chilcote, J. K., De Rosa, R. J., Dillon, D., Doyon, R., Dunn, J., Erikson, D., Fitzgerald, M. P., Gavel, D., Goodsell, S. J., Graham, J. R., Hartung, M., Hibon, P., Kalas, P. G., Konopacky, Q., Larkin, J. A., Maire, J., Marchis, F., McBride, J., Millar-Blanchaer, M., Morzinski, K. M., Norton, A., Oppenheimer, R., Palmer, D. W., Patience, J., Perrin, M. D., Poyneer, L. A., Pueyo, L., Rantakyroe, F., Sadakuni, N., Saddlemyer, L., Savransky, D., Soummer, R., Sivaramakrishnan, A., Song, I., Thomas, S., Wallace, J. K., Wiktorowicz, S. J., Wolff, S. G. 2014; 794 (1)
  • First light of the Gemini Planet Imager PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA Macintosh, B., Graham, J. R., Ingraham, P., Konopacky, Q., Marois, C., Perrin, M., Poyneer, L., Bauman, B., Barman, T., Burrows, A. S., Cardwell, A., Chilcote, J., De Rosa, R. J., Dillon, D., Doyon, R., Dunn, J., Erikson, D., Fitzgerald, M. P., Gavel, D., Goodsell, S., Hartung, M., Hibon, P., Kalas, P., Larkin, J., Maire, J., Marchis, F., Marley, M. S., McBride, J., Millar-Blanchaer, M., Morzinski, K., Norton, A., Oppenheimer, B. R., Palmer, D., Patience, J., Pueyo, L., Rantakyro, F., Sadakuni, N., Saddlemyer, L., Savransky, D., Serio, A., Soummer, R., Sivaramakrishnan, A., Song, I., Thomas, S., Wallace, J. K., Wiktorowicz, S., Wolff, S. 2014; 111 (35): 12661-12666
  • First light of the Gemini Planet imager. Proceedings of the National Academy of Sciences of the United States of America Macintosh, B., Graham, J. R., Ingraham, P., Konopacky, Q., Marois, C., Perrin, M., Poyneer, L., Bauman, B., Barman, T., Burrows, A. S., Cardwell, A., Chilcote, J., De Rosa, R. J., Dillon, D., Doyon, R., Dunn, J., Erikson, D., Fitzgerald, M. P., Gavel, D., Goodsell, S., Hartung, M., Hibon, P., Kalas, P., Larkin, J., Maire, J., Marchis, F., Marley, M. S., McBride, J., Millar-Blanchaer, M., Morzinski, K., Norton, A., Oppenheimer, B. R., Palmer, D., Patience, J., Pueyo, L., Rantakyro, F., Sadakuni, N., Saddlemyer, L., Savransky, D., Serio, A., Soummer, R., Sivaramakrishnan, A., Song, I., Thomas, S., Wallace, J. K., Wiktorowicz, S., Wolff, S. 2014; 111 (35): 12661-12666

    Abstract

    The Gemini Planet Imager is a dedicated facility for directly imaging and spectroscopically characterizing extrasolar planets. It combines a very high-order adaptive optics system, a diffraction-suppressing coronagraph, and an integral field spectrograph with low spectral resolution but high spatial resolution. Every aspect of the Gemini Planet Imager has been tuned for maximum sensitivity to faint planets near bright stars. During first-light observations, we achieved an estimated H band Strehl ratio of 0.89 and a 5-σ contrast of 10(6) at 0.75 arcseconds and 10(5) at 0.35 arcseconds. Observations of Beta Pictoris clearly detect the planet, Beta Pictoris b, in a single 60-s exposure with minimal postprocessing. Beta Pictoris b is observed at a separation of 434 ± 6 milliarcseconds (mas) and position angle 211.8 ± 0.5°. Fitting the Keplerian orbit of Beta Pic b using the new position together with previous astrometry gives a factor of 3 improvement in most parameters over previous solutions. The planet orbits at a semimajor axis of [Formula: see text] near the 3:2 resonance with the previously known 6-AU asteroidal belt and is aligned with the inner warped disk. The observations give a 4% probability of a transit of the planet in late 2017.

    View details for DOI 10.1073/pnas.1304215111

    View details for PubMedID 24821792

  • Probing an Extrasolar Planet SCIENCE Marley, M. S. 2013; 339 (6126): 1393-1394
  • MASSES, RADII, AND CLOUD PROPERTIES OF THE HR 8799 PLANETS ASTROPHYSICAL JOURNAL Marley, M. S., Saumon, D., Cushing, M., Ackerman, A. S., Fortney, J. J., Freedman, R. 2012; 754 (2)
  • THE DISCOVERY OF Y DWARFS USING DATA FROM THE WIDE-FIELD INFRARED SURVEY EXPLORER (WISE) ASTROPHYSICAL JOURNAL Cushing, M. C., Kirkpatrick, J. D., Gelino, C. R., Griffith, R. L., Skrutskie, M. F., Mainzer, A., Marsh, K. A., Beichman, C. A., Burgasser, A. J., Prato, L. A., Simcoe, R. A., Marley, M. S., Saumon, D., Freedman, R. S., Eisenhardt, P. R., Wright, E. L. 2011; 743 (1)
  • Probing the physical properties of directly imaged gas giant exoplanets through polarization MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Marley, M. S., Sengupta, S. 2011; 417 (4): 2874-2881
  • THE FIRST ULTRA-COOL BROWN DWARF DISCOVERED BY THE WIDE-FIELD INFRARED SURVEY EXPLORER ASTROPHYSICAL JOURNAL Mainzer, A., Cushing, M. C., Skrutskie, M., Gelino, C. R., Kirkpatrick, J. D., Jarrett, T., Masci, F., Marley, M. S., Saumon, D., Wright, E., Beaton, R., Dietrich, M., Eisenhardt, P., Garnavich, P., Kuhn, O., Leisawitz, D., Marsh, K., MCLEAN, I., Padgett, D., Rueff, K. 2011; 726 (1)
  • EXOPLANET ALBEDO SPECTRA AND COLORS AS A FUNCTION OF PLANET PHASE, SEPARATION, AND METALLICITY ASTROPHYSICAL JOURNAL Cahoy, K. L., Marley, M. S., Fortney, J. J. 2010; 724 (1): 189-214
  • A PATCHY CLOUD MODEL FOR THE L TO T DWARF TRANSITION ASTROPHYSICAL JOURNAL LETTERS Marley, M. S., Saumon, D., Goldblatt, C. 2010; 723 (1): L117-L121
  • A unified theory for the atmospheres of the hot and very hot jupiters: Two classes of irradiated atmospheres ASTROPHYSICAL JOURNAL Fortney, J. J., Lodders, K., Marley, M. S., Freedman, R. S. 2008; 678 (2): 1419-1435
  • Planetary radii across five orders of magnitude in mass and stellar insolation: Application to transits (vol 659, pg 1661, 2007) ASTROPHYSICAL JOURNAL Fortney, J. J., Marley, M. S., Barnes, J. W. 2007; 668 (2): 1267-1267
  • On the luminosity of young jupiters ASTROPHYSICAL JOURNAL Marley, M. S., Fortney, J. J., Hubickyj, O., Bodenheimer, P., Lissauer, J. J. 2007; 655 (1): 541-549
  • A Spitzer infrared spectrograph spectral sequence of M, L, and T dwarfs ASTROPHYSICAL JOURNAL Cushing, M. C., Roellig, T. L., Marley, M. S., Saumon, D., Leggett, S. K., Kirkpatrick, J. D., Wilson, J. C., Sloan, G. C., Mainzer, A. K., Van Cleve, J. E., Houck, J. R. 2006; 648 (1): 614-628
  • Clouds and chemistry: Ultracool dwarf atmospheric properties from optical and infrared colors ASTROPHYSICAL JOURNAL Marley, M. S., Seager, S., Saumon, D., Lodders, K., Ackerman, A. S., Freedman, R. S., Fan, X. H. 2002; 568 (1): 335-342
  • Precipitating condensation clouds in substellar atmospheres ASTROPHYSICAL JOURNAL Ackerman, A. S., Marley, M. S. 2001; 556 (2): 872-884
  • Reflected spectra and albedos of extrasolar giant planets. I. Clear and cloudy atmospheres ASTROPHYSICAL JOURNAL Marley, M. S., Gelino, C., Stephens, D., Lunine, J. I., Freedman, R. 1999; 513 (2): 879-893
  • A nongray theory of extrasolar giant planets and brown dwarfs ASTROPHYSICAL JOURNAL Burrows, A., Marley, M., HUBBARD, W. B., Lunine, J. I., Guillot, T., Saumon, D., Freedman, R., Sudarsky, D., Sharp, C. 1997; 491 (2): 856-875
  • Atmospheric, evolutionary, and spectral models of the brown dwarf Gliese 229 B SCIENCE Marley, M. S., Saumon, D., Guillot, T., Freedman, R. S., HUBBARD, W. B., Burrows, A., Lunine, J. I. 1996; 272 (5270): 1919-1921

    Abstract

    Theoretical spectra and evolutionary models that span the giant planet-brown dwarf continuum have been computed based on the recent discovery of the brown dwarf Gliese 229 B. A flux enhancement in the 4- to 5-micrometer wavelength window is a universal feature from jovian planets to brown dwarfs. Model results confirm the existence of methane and water in the spectrum of Gliese 229 B and indicate that its mass is 30 to 55 jovian masses. Although these calculations focus on Gliese 229 B, they are also meant to guide future searches for extrasolar giant planets and brown dwarfs.

    View details for Web of Science ID A1996UV29400041

    View details for PubMedID 8658164

  • COLLISION OF COMET SHOEMAKER-LEVY-9 WITH JUPITER OBSERVED BY THE NASA INFRARED TELESCOPE FACILITY SCIENCE Orton, G., Ahearn, M., Baines, K., Deming, D., Dowling, T., Goguen, J., Griffith, C., HAMMEL, H., Hoffmann, W., Hunten, D., Jewitt, D., Kostiuk, T., Miller, S., Noll, K., Zahnle, K., Achilleos, N., Dayal, A., Deutsch, L., Espenak, F., ESTERLE, P., FRIEDSON, J., Fast, K., Harrington, J., Hora, J., Joseph, R., Kelly, D., Knacke, R., Lacy, J., Lisse, C., Rayner, J., Sprague, A., Shure, M., Wells, K., YANAMANDRAFISHER, P., Zipoy, D., Bjoraker, G., Buhl, D., Golisch, W., Griep, D., Kaminski, C., Arden, C., Chaikin, A., Goldstein, J., Gilmore, D., Fazio, G., Kanamori, T., Lam, H., Livengood, T., MacLow, M. M., Marley, M., Momary, T., ROBERTSON, D., Romani, P., Spitale, J., Sykes, M., Tennyson, J., Wellnitz, D., Ying, S. W. 1995; 267 (5202): 1277-1282

    Abstract

    The National Aeronautics and Space Administration (NASA) Infrared Telescope Facility was used to investigate the collision of comet Shoemaker-Levy 9 with Jupiter from 12 July to 7 August 1994. Strong thermal infrared emission lasting several minutes was observed after the impacts of fragments C, G, and R. All impacts warmed the stratosphere and some the troposphere up to several degrees. The abundance of stratospheric ammonia increased by more than 50 times. Impact-related particles extended up to a level where the atmospheric pressure measured several millibars. The north polar near-infrared aurora brightened by nearly a factor of 5 a week after the impacts.

    View details for Web of Science ID A1995QK06800028

    View details for PubMedID 7871423

  • SEISMOLOGICAL CONSEQUENCES OF THE COLLISION OF SHOEMAKER-LEVY/9 WITH JUPITER ASTROPHYSICAL JOURNAL Marley, M. S. 1994; 427 (1): L63-L66
  • PLANETARY ACOUSTIC MODE SEISMOLOGY - SATURNS RINGS ICARUS Marley, M. S., Porco, C. C. 1993; 106 (2): 508-524