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Discovery and spectroscopy of the young jovian planet 51 Eri b with the Gemini Planet Imager.
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; Duchêne, 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-W; Ingraham, P; Johnson-Groh, M; Kalas, P; Lafreniere, D; Larkin, J E; Lee, J; Line, M.
Afiliação
  • Macintosh B; Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 94305, USA. Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94040, USA. bmacintosh@stanford.edu.
  • Graham JR; Department of Astronomy, University of California-Berkeley, Berkeley, CA 94720, USA.
  • Barman T; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA.
  • De Rosa RJ; Department of Astronomy, University of California-Berkeley, Berkeley, CA 94720, USA.
  • Konopacky Q; Center for Astrophysics and Space Sciences, University of California-San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
  • Marley MS; NASA Ames Research Center, MS 245-3, Moffett Field, CA 94035, USA.
  • Marois C; National Research Council of Canada, Herzberg Institute of Astrophysics, 5071 West Saanich Road, Victoria, British Columbia V9E 2E7, Canada. Department of Physics and Astronomy, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada.
  • Nielsen EL; Search for Extraterrestrial Intelligence Institute, Carl Sagan Center, 189 Bernardo Avenue, Mountain View, CA 94043, USA. Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 94305, USA.
  • Pueyo L; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA.
  • Rajan A; School of Earth and Space Exploration, Arizona State University, Post Office Box 871404, Tempe, AZ 85287, USA.
  • Rameau J; Institut de Recherche sur les Exoplanètes, Départment de Physique, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
  • Saumon D; Los Alamos National Laboratory, Post Office Box 1663, MS F663, Los Alamos, NM 87545, USA.
  • Wang JJ; Department of Astronomy, University of California-Berkeley, Berkeley, CA 94720, USA.
  • Patience J; School of Earth and Space Exploration, Arizona State University, Post Office Box 871404, Tempe, AZ 85287, USA.
  • Ammons M; Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94040, USA.
  • Arriaga P; Department of Physics and Astronomy, University of California-Los Angeles, 430 Portola Plaza, Los Angeles, CA 90095, USA.
  • Artigau E; Institut de Recherche sur les Exoplanètes, Départment de Physique, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
  • Beckwith S; Department of Astronomy, University of California-Berkeley, Berkeley, CA 94720, USA.
  • Brewster J; Search for Extraterrestrial Intelligence Institute, Carl Sagan Center, 189 Bernardo Avenue, Mountain View, CA 94043, USA.
  • Bruzzone S; Department of Physics and Astronomy, Centre for Planetary Science and Exploration, The University of Western Ontario, London, Ontario N6A 3K7, Canada.
  • Bulger J; School of Earth and Space Exploration, Arizona State University, Post Office Box 871404, Tempe, AZ 85287, USA. Subaru Telescope, 650 North A'ohoku Place, Hilo, HI 96720, USA.
  • Burningham B; NASA Ames Research Center, MS 245-3, Moffett Field, CA 94035, USA. Science and Technology Research Institute, University of Hertfordshire, Hatfield AL10 9AB, UK.
  • Burrows AS; Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA.
  • Chen C; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA.
  • Chiang E; Department of Astronomy, University of California-Berkeley, Berkeley, CA 94720, USA.
  • Chilcote JK; Dunlap Institute for Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, Ontario M5S 3H4, Canada.
  • Dawson RI; Department of Astronomy, University of California-Berkeley, Berkeley, CA 94720, USA.
  • Dong R; Department of Astronomy, University of California-Berkeley, Berkeley, CA 94720, USA.
  • Doyon R; Institut de Recherche sur les Exoplanètes, Départment de Physique, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
  • Draper ZH; Department of Physics and Astronomy, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada. National Research Council of Canada, Herzberg Institute of Astrophysics, 5071 West Saanich Road, Victoria, British Columbia V9E 2E7, Canada.
  • Duchêne G; Department of Astronomy, University of California-Berkeley, Berkeley, CA 94720, USA. Institut de Planétologie et d'Astrophysique de Grenoble, Université Grenoble Alpes, Centre National de la Recherche Scientifique, 38000 Grenoble, France.
  • Esposito TM; Department of Physics and Astronomy, University of California-Los Angeles, 430 Portola Plaza, Los Angeles, CA 90095, USA.
  • Fabrycky D; Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA.
  • Fitzgerald MP; Department of Physics and Astronomy, University of California-Los Angeles, 430 Portola Plaza, Los Angeles, CA 90095, USA.
  • Follette KB; Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 94305, USA.
  • Fortney JJ; Department of Astronomy and Astrophysics, University of California-Santa Cruz, Santa Cruz, CA 95064, USA.
  • Gerard B; Department of Physics and Astronomy, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada. National Research Council of Canada, Herzberg Institute of Astrophysics, 5071 West Saanich Road, Victoria, British Columbia V9E 2E7, Canada.
  • Goodsell S; Department of Physics, Durham University, Stockton Road, Durham DH1, UK. Gemini Observatory, Casilla 603, La Serena, Chile.
  • Greenbaum AZ; Department of Physics and Astronomy, Johns Hopkins University, 3600 North Charles Street, Baltimore, MD 21218, USA. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA.
  • Hibon P; Gemini Observatory, Casilla 603, La Serena, Chile.
  • Hinkley S; University of Exeter, Astrophysics Group, Physics Building, Stocker Road, Exeter EX4 4QL, UK.
  • Cotten TH; Department of Physics and Astronomy, University of Georgia, Athens, GA 30602, USA.
  • Hung LW; Department of Physics and Astronomy, University of California-Los Angeles, 430 Portola Plaza, Los Angeles, CA 90095, USA.
  • Ingraham P; Large Synoptic Survey Telescope, 950 North Cherry Avenue, Tucson, AZ 85719, USA.
  • Johnson-Groh M; Department of Physics and Astronomy, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada. National Research Council of Canada, Herzberg Institute of Astrophysics, 5071 West Saanich Road, Victoria, British Columbia V9E 2E7, Canada.
  • Kalas P; Department of Astronomy, University of California-Berkeley, Berkeley, CA 94720, USA. Search for Extraterrestrial Intelligence Institute, Carl Sagan Center, 189 Bernardo Avenue, Mountain View, CA 94043, USA.
  • Lafreniere D; Institut de Recherche sur les Exoplanètes, Départment de Physique, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
  • Larkin JE; Department of Physics and Astronomy, University of California-Los Angeles, 430 Portola Plaza, Los Angeles, CA 90095, USA.
  • Lee J; Department of Physics and Astronomy, University of Georgia, Athens, GA 30602, USA.
  • Line M; Department of Astronomy and Astrophysics, University of California-Santa Cruz, Santa Cruz, CA 95064, USA.
Science ; 350(6256): 64-7, 2015 Oct 02.
Article em En | MEDLINE | ID: mdl-26272904
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.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2015 Tipo de documento: Article
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2015 Tipo de documento: Article