Po-Shih Chiang 姜博識"Discovery and spectroscopy of the young Jovian planet 51 Eri b with the Gemini Planet Imager"
時間/地點： 2015-10-08 12:00 [S4-914]
摘要：
Directly detecting thermal emission from young extrasolar planets allows measurement of their atmospheric composition and luminosity, which is influenced by their formation mechanism. Using the Gemini Planet Imager, we discovered a planet orbiting the $sim$20 Myr-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 of L/LS=1.6-4.0 x 10-6 and an effective temperature of 600-750 K. 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.
作者：
B. Macintosh, et al.
期刊：
arXiv:1508.03084
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