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The First H-band Spectrum of the Giant Planet β Pictoris b

Author(s): Chilcote, Jeffrey; Barman, Travis; Fitzgerald, Michael P.; Graham, James R; Larkin, James E; et al

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Abstract: Using the recently installed Gemini Planet Imager (GPI), we have obtained the first H-band spectrum of the planetary companion to the nearby young starβPictoris. GPI is designed to image and provide low-resolution spectra of Jupiter-sized, self-luminous planetary companions around young nearby stars. These observations were taken covering the Hband (1.65μm). The spectrum has a resolving power of∼45 and demonstrates the distinctive triangular shape of a cool substellar object with low surface gravity. Using atmospheric models, we find an effective temperature of 1600–1700 K and a surface gravity of log(g)=3.5–4.5 (cgs units). These values agree well with“hot-start” predictions from planetary evolution models for a gas giant with mass between 10 and 12MJupand age between 10 and 20 Myr.
Publication Date: Jan-2015
Citation: Chilcote, Jeffrey, Barman, Travis, Fitzgerald, Michael P, Graham, James R, Larkin, James E, Macintosh, Bruce, Bauman, Brian, Burrows, Adam S, Cardwell, Andrew, De Rosa, Robert J, Dillon, Daren, Doyon, René, Dunn, Jennifer, Erikson, Darren, Gavel, Donald, Goodsell, Stephen J, Hartung, Markus, Hibon, Pascale, Ingraham, Patrick, Kalas, Paul, Konopacky, Quinn, Maire, Jérôme, Marchis, Franck, Marley, Mark S, Marois, Christian, Millar-Blanchaer, Max, Morzinski, Katie, Norton, Andrew, Oppenheimer, Rebecca, Palmer, David, Patience, Jennifer, Perrin, Marshall, Poyneer, Lisa, Pueyo, Laurent, Rantakyrö, Fredrik T, Sadakuni, Naru, Saddlemyer, Leslie, Savransky, Dmitry, Serio, Andrew, Sivaramakrishnan, Anand, Song, Inseok, Soummer, Rémi, Thomas, Sandrine, Wallace, J Kent, Wiktorowicz, Sloane, Wolff, Schuyler. (2015). The First H-band Spectrum of the Giant Planet \ensuremathβ Pictoris b. \apj, 798 (L3 - L3. doi:10.1088/2041-8205/798/1/L3
DOI: doi:10.1088/2041-8205/798/1/L3
Type of Material: Journal Article
Journal/Proceeding Title: Astrophysical Journal Letters
Version: Final published version. This is an open access article.

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