Discovery of the Transiting Planet Kepler-5B

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Koch, David G.
Borucki, William J.
Rowe, Jason F.
Batalha, Natalie M.
Brown, Timothy M.
Caldwell, Douglas A.
Caldwell, John
Cochran, William D.
DeVore, Edna
Dunham, Edward W.

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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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Koch, David G., William J. Borucki, Jason F. Rowe, Natalie M. Batalha, Timothy M. Brown, Douglas A. Caldwell, John Caldwell et al. "Discovery of the transiting planet Kepler-5b." The Astrophysical Journal Letters, Vol. 713, No. 2 (Apr., 2010): L131.