Discovery of the Transiting Planet Kepler-5b
David G. Koch (NASA Ames Research Center), William J. Borucki (NASA, Ames Research Center), Jason F. Rowe (NASA Ames Research Center), Natalie M., Batalha (San Jose State University), Timothy M. Brown (Las Cumbres, Observatory Global Telescope)
TL;DR
This paper reports the discovery and characterization of Kepler-5b, a transiting exoplanet with a radius slightly larger than Jupiter and a mass over twice that of Jupiter, identified through precise photometry and confirmed with radial velocity measurements.
Contribution
First detailed photometric and spectroscopic confirmation of Kepler-5b, a new transiting exoplanet with precise measurements of its size, mass, and density.
Findings
Kepler-5b has a radius of 1.431 Rj.
Kepler-5b has a mass of 2.114 Mj.
Kepler-5b's density is approximately 0.894 g/cm^3.
Abstract
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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