GEMINI PLANET IMAGER SPECTROSCOPY OF THE HR 8799 PLANETS c AND d

Ingraham, Patrick; Macintosh, Bruce; Marley, Mark S.; Saumon, Didier; Marois, Christian; Dunn, Jennifer; Erikson, Darren; Barman, Travis; Bauman, Brian; Burrows, Adam; Chilcote, Jeffrey K.; Fitzgerald, Michael P.; De Rosa, Robert J.; Dillon, Daren; Gavel, Donald; Doyon, René; Goodsell, Stephen J.; Hartung, Markus; Hibon, Pascale; Graham, James R.; others, and

doi:10.1088/2041-8205/794/1/L15

Title: GEMINI PLANET IMAGER SPECTROSCOPY OF THE HR 8799 PLANETS c AND d

Journal Article · Fri Oct 10 00:00:00 EDT 2014 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/794/1/L15· OSTI ID:22364937

Ingraham, Patrick; Macintosh, Bruce ^[1]; Marley, Mark S. ^[2]; Saumon, Didier ^[3]; Marois, Christian; Dunn, Jennifer; Erikson, Darren ^[4]; Barman, Travis ^[5]; Bauman, Brian ^[6]; Burrows, Adam ^[7]; Chilcote, Jeffrey K.; Fitzgerald, Michael P. ^[8]; De Rosa, Robert J. ^[9]; Dillon, Daren; Gavel, Donald ^[10]; Doyon, René ^[11]; Goodsell, Stephen J.; Hartung, Markus; Hibon, Pascale ^[12]; Graham, James R. ^[13] more »

Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 94305 (United States)
NASA Ames Research Center, Moffett Field, CA 94035 (United States)
Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
NRC Herzberg Astronomy and Astrophysics, 5071 West Saanich Road, Victoria, BC V9E 2E7 (Canada)
Lunar and Planetary Laboratory, University of Arizona, Tucson, Arizona 85721-0092 (United States)
Lawrence Livermore National Lab, 7000 East Avenue, Livermore, CA 94551 (United States)
Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States)
Department of Physics and Astronomy, UCLA, Los Angeles, CA 90095 (United States)
School of Earth and Space Exploration, Arizona State University, PO Box 871404, Tempe, AZ 85287 (United States)
Department of Astronomy, UC Santa Cruz, 1156 High Street, Santa Cruz, CA 95064 (United States)
Department de Physique, Université de Montréal, Montréal QC H3C 3J7 (Canada)
Gemini Observatory, Casilla 603, La Serena (Chile)
Department of Astronomy, UC Berkeley, Berkeley CA, 94720 (United States)

During the first-light run of the Gemini Planet Imager we obtained K-band spectra of exoplanets HR 8799 c and d. Analysis of the spectra indicates that planet d may be warmer than planet c. Comparisons to recent patchy cloud models and previously obtained observations over multiple wavelengths confirm that thick clouds combined with horizontal variation in the cloud cover generally reproduce the planets' spectral energy distributions. When combined with the 3 to 4 μm photometric data points, the observations provide strong constraints on the atmospheric methane content for both planets. The data also provide further evidence that future modeling efforts must include cloud opacity, possibly including cloud holes, disequilibrium chemistry, and super-solar metallicity.

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OSTI ID:: 22364937

Journal Information:: Astrophysical Journal Letters, Vol. 794, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205

Country of Publication:: United States

Language:: English

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First light of the VLT planet finder SPHERE: IV. Physical and chemical properties of the planets around HR8799⋆ Bonnefoy, M.; Zurlo, A.; Baudino, J. L. Astronomy & Astrophysics, Vol. 587 https://doi.org/10.1051/0004-6361/201526906	journal	February 2016
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SIMULTANEOUS DETECTION OF WATER, METHANE, AND CARBON MONOXIDE IN THE ATMOSPHERE OF EXOPLANET HR 8799 b Barman, Travis S.; Konopacky, Quinn M.; Macintosh, Bruce The Astrophysical Journal, Vol. 804, Issue 1 https://doi.org/10.1088/0004-637x/804/1/61	journal	May 2015
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GPI Spectra of HR 8799 c, d, and e from 1.5 to 2.4 μ m with KLIP Forward Modeling Greenbaum, Alexandra Z.; Pueyo, Laurent; Ruffio, Jean-Baptiste The Astronomical Journal, Vol. 155, Issue 6 https://doi.org/10.3847/1538-3881/aabcb8	journal	May 2018
The LEECH Exoplanet Imaging Survey: Limits on Planet Occurrence Rates under Conservative Assumptions Stone, Jordan M.; Skemer, Andrew J.; Hinz, Philip M. The Astronomical Journal, Vol. 156, Issue 6 https://doi.org/10.3847/1538-3881/aaec00	journal	November 2018
Cloud Atlas: High-contrast Time-resolved Observations of Planetary-mass Companions Zhou, Yifan; Apai, Dániel; Lew, Ben W. P. The Astronomical Journal, Vol. 157, Issue 3 https://doi.org/10.3847/1538-3881/ab037f	journal	February 2019
The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics from 10 to 100 au Nielsen, Eric L.; De Rosa, Robert J.; Macintosh, Bruce The Astronomical Journal, Vol. 158, Issue 1 https://doi.org/10.3847/1538-3881/ab16e9	journal	June 2019
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Resolved Millimeter Observations of the HR 8799 Debris Disk Wilner, David J.; MacGregor, Meredith A.; Andrews, Sean M. The Astrophysical Journal, Vol. 855, Issue 1 https://doi.org/10.3847/1538-4357/aaacd7	journal	March 2018
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Simultaneous Detection of Water, Methane and Carbon Monoxide in the Atmosphere of Exoplanet HR8799b Barman, Travis S.; Konopacky, Quinn M.; Macintosh, Bruce arXiv https://doi.org/10.48550/arxiv.1503.03539	text	January 2015
First light of the VLT planet finder SPHERE. IV. Physical and chemical properties of the planets around HR8799 Bonnefoy, M.; Zurlo, A.; Baudino, J. L. arXiv https://doi.org/10.48550/arxiv.1511.04082	text	January 2015
First light of the VLT planet finder SPHERE. III. New spectrophotometry and astrometry of the HR8799 exoplanetary system Zurlo, A.; Vigan, A.; Galicher, R. arXiv https://doi.org/10.48550/arxiv.1511.04083	text	January 2015
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Spectral and atmospheric characterization of 51 Eridani b using VLT/SPHERE Samland, M.; Mollière, P.; Bonnefoy, M. arXiv https://doi.org/10.48550/arxiv.1704.02987	text	January 2017
Cloud Atlas: Rotational Modulations in the L/T Transition Brown Dwarf Companion HN Peg B Zhou, Yifan; Apai, Dániel; Metchev, Stanimir arXiv https://doi.org/10.48550/arxiv.1801.09757	text	January 2018
The LEECH Exoplanet Imaging Survey: Limits on Planet Occurrence Rates Under Conservative Assumptions Stone, Jordan M.; Skemer, Andrew J.; Hinz, Philip M. arXiv https://doi.org/10.48550/arxiv.1810.10560	text	January 2018
Combining angular differential imaging and accurate polarimetry with SPHERE/IRDIS to characterize young giant exoplanets van Holstein, Rob G.; Snik, Frans; Girard, Julien H. arXiv https://doi.org/10.48550/arxiv.1709.07519	text	January 2017

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Title: GEMINI PLANET IMAGER SPECTROSCOPY OF THE HR 8799 PLANETS c AND d

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