WASP-29b: A Saturn-sized transiting exoplanet

Coel Hellier (Keele University) , D.R. Anderson , A. Collier Cameron , M. Gillon , M. Lendl , P.F.L. Maxted , D. Queloz , B. Smalley

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A.H.M.J. Triaud R.G. West D.J.A. Brown B. Enoch T.A. Lister F. Pepe D. Pollacco D. Segransan S. Udry

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classification 🌌 astro-ph.EP

keywords exoplanethostmassplanetplanetsradiussaturn-sizedstar

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We report the discovery of a Saturn-sized planet transiting a V = 11.3, K4 dwarf star every 3.9 d. WASP-29b has a mass of 0.24+/-0.02 M_Jup and a radius of 0.79+/-0.05 R_Jup, making it the smallest planet so far discovered by the WASP survey, and the exoplanet most similar in mass and radius to Saturn. The host star WASP-29 has an above-Solar metallicity and fits a possible correlation for Saturn-mass planets such that planets with higher-metallicity host stars have higher core masses and thus smaller radii.

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WASP-29b: A Saturn-sized transiting exoplanet

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