Discovery and spectroscopy of the young jovian planet 51 Eri b with the Gemini Planet ImagerReport as inadecuate




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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.Nota general

Artículo de publicación ISI



Author: Macintosh, B.; - Graham, J. R.; - Barman, T.; - Rosa, R. De; - Konopacky, Q.; - Marley, M.; - Marois, C.; - Nielsen, E.; - Pueyo,

Source: http://repositorio.uchile.cl/



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