Skip to main content

Gemini Planet Imager Spectroscopy of the HR 8799 Planets c and d

Author(s): Ingraham, Patrick; Marley, Mark S; Saumon, Didier; Marois, Christian; Macintosh, Bruce; et al

To refer to this page use:
Abstract: 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 4μm photometric data points, the observations provide strong constraints on the atmospheric methanec ontent 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.
Publication Date: 10-Oct-2014
Electronic Publication Date: 30-Sep-2014
Citation: Ingraham, Patrick, Marley, Mark S, Saumon, Didier, Marois, Christian, Macintosh, Bruce, Barman, Travis, Bauman, Brian, Burrows, Adam, Chilcote, Jeffrey K, De Rosa, Robert J, Dillon, Daren, Doyon, René, Dunn, Jennifer, Erikson, Darren, Fitzgerald, Michael P, Gavel, Donald, Goodsell, Stephen J, Graham, James R, Hartung, Markus, Hibon, Pascale, Kalas, Paul G, Konopacky, Quinn, Larkin, James A, Maire, Jérôme, Marchis, Franck, McBride, James, Millar-Blanchaer, Max, Morzinski, Katie M, Norton, Andrew, Oppenheimer, Rebecca, Palmer, Dave W, Patience, Jenny, Perrin, Marshall D, Poyneer, Lisa A, Pueyo, Laurent, Rantakyrö, Fredrik, Sadakuni, Naru, Saddlemyer, Leslie, Savransky, Dmitry, Soummer, Rémi, Sivaramakrishnan, Anand, Song, Inseok, Thomas, Sandrine, Wallace, J Kent, Wiktorowicz, Sloane J, Wolff, Schuyler G. (2014). Gemini Planet Imager Spectroscopy of the HR 8799 Planets c and d. \apj, 794 (L15 - L15. doi:10.1088/2041-8205/794/1/L15
DOI: doi:10.1088/2041-8205/794/1/L15
Type of Material: Journal Article
Journal/Proceeding Title: Astrophysical Journal
Version: Final published version. This is an open access article.

Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.