THE FIRST H-BAND SPECTRUM OF THE GIANT PLANET β PICTORIS b

摘要: Author(s): Chilcote, J; Barman, T; Fitzgerald, MP; Graham, JR; Larkin, JE; Macintosh, B; Bauman, Burrows, AS; Cardwell, A; De Rosa, RJ; Dillon, D; Doyon, R; Dunn, Erikson, Gavel, Goodsell, SJ; Hartung, M; Hibon, P; Ingraham, Kalas, Konopacky, Q; Maire, Marchis, F; Marley, MS; Marois, C; Millar-Blanchaer, Morzinski, K; Norton, Oppenheimer, Palmer, Patience, Perrin, Poyneer, L; Pueyo, Rantakyro, FT; Sadakuni, N; Saddlemyer, Savransky, Serio, Sivaramakrishnan, Song, I; Soummer, Thomas, S; Wallace, JK; Wiktorowicz, Wolff, S | Abstract: © 2015. The American Astronomical Society. All rights reserved. Using the recently installed Gemini Planet Imager (GPI), we have obtained first H-band spectrum of planetary companion to nearby young star β Pictoris. GPI is designed image and provide low-resolution spectra Jupiter-sized, self-luminous companions around stars. These observations were taken covering H band (1.65 μm). has a resolving power ∼45 demonstrates distinctive triangular shape cool substellar object with low surface gravity. atmospheric models, find an effective temperature 1600-1700K gravity log(g) = 3.5-4.5 (cgs units). values agree well "hot-start" predictions from evolution models for gas giant mass between 10 12 MJup age 20 Myr.