The low density transiting exoplanet WASP-15b

Details The low density transiting exoplanet WASP-15b The low density transiting exoplanet WASP-15b

2009-02-16

arxiv.org/abs/0902.2651v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

Submitted to AJ

Scientific paper

10.1088/0004-6256/137/6/4834

We report the discovery of a low-density exoplanet transiting an 11th magnitude star in the Southern hemisphere. WASP-15b, which orbits its host star with a period P=3.7520656+-0.0000028d has a mass M_p=0.542+-0.050M_J and radius R_p=1.428+-0.077R_J, and is therefore the one of least dense transiting exoplanets so far discovered (rho_p=0.247+-0.035g cm^-3). An analysis of the spectrum of the host star shows it to be of spectral type around F5, with an effective temperature T_eff=6300+-100K and [Fe/H]=-0.17+-0.11.

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