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Details

Autor(en) / Beteiligte
Titel
Discovery and spectroscopy of the young jovian planet 51 Eri b with the Gemini Planet Imager
Ist Teil von
  • Science (American Association for the Advancement of Science), 2015-10, Vol.350 (6256), p.64-67
Ort / Verlag
United States: American Association for the Advancement of Science
Erscheinungsjahr
2015
Quelle
American Association for the Advancement of Science
Beschreibungen/Notizen
  • 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.
Sprache
Englisch
Identifikatoren
ISSN: 0036-8075
eISSN: 1095-9203
DOI: 10.1126/science.aac5891
Titel-ID: cdi_osti_scitechconnect_1258658

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