期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 713, 期 2, 页码 L131-L135出版社
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/713/2/L131
关键词
planetary systems; stars: individual (Kepler-5, KIC 8191672, 2MASS 19573768+4402061); techniques: spectroscopic
资金
- NASA's Science Mission Directorate
We present 44 days of high duty cycle, ultra precise photometry of the 13th magnitude star Kepler-5 (KIC 8191672, T(eff) = 6300 K, log g = 4.1), which exhibits periodic transits with a depth of 0.7%. Detailed modeling of the transit is consistent with a planetary companion with an orbital period of 3.548460 +/- 0.000032 days and a radius of 1.431(-0.052)(+0.041) R(J). Follow-up radial velocity measurements with the Keck HIRES spectrograph on nine separate nights demonstrate that the planet is more than twice as massive as Jupiter with a mass of 2.114(-0.059)(+0.056) M(J) and a mean density of 0.894 +/- 0.079 g cm(-3).
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