Discovery of the Transiting Planet Kepler-5b

Details Discovery of the Transiting Planet Kepler-5b Discovery of the Transiting Planet Kepler-5b

2010-01-06

arxiv.org/abs/1001.0913v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

13 pages, 3 figures, submitted to the Astrophysical Journal Letters

Scientific paper

We present 44 days of high duty cycle, ultra precise photometry of the 13th magnitude star Kepler-5 (KIC 8191672, Teff=6300 K, logg=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+/-0.050 Rj. Follow-up radial velocity measurements with the Keck HIRES spectrograph on 9 separate nights demonstrate that the planet is more than twice as massive as Jupiter with a mass of 2.114+/-0.057 and a mean density of 0.894+/-0.079 g/cm^3.

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