Kepler-7b: A Transiting Planet with Unusually Low Density

Details Kepler-7b: A Transiting Planet with Unusually Low Density Kepler-7b: A Transiting Planet with Unusually Low Density

2009-12-31

arxiv.org/abs/1001.0190v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

19 pages, 3 figures

Scientific paper

We report the discovery and confirmation of Kepler-7b, a transiting planet with unusually low density. The mass is less than half that of Jupiter, Mp = 0.43 Mj, but the radius is fifty percent larger, Rp = 1.48 Rj. The resulting density, 0.17 g/cc, is the second lowest reported so far for an extrasolar planet. The orbital period is fairly long, P = 4.886 days, and the host star is not much hotter than the Sun, Teff = 6000 K. However, it is more massive and considerably larger than the sun, Mstar = 1.35 Msun and Rstar = 1.84 Rsun, and must be near the end of its life on the Main Sequence.

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