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, 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
TL;DR
This paper reports the discovery of WASP-29b, a Saturn-sized exoplanet transiting a K4 dwarf star, with detailed measurements of its mass, radius, and host star properties, contributing to understanding planet formation.
Contribution
It presents the discovery and characterization of the smallest exoplanet found by WASP, with insights into the correlation between host star metallicity and planet core mass.
Findings
WASP-29b is the smallest planet discovered by WASP.
WASP-29b has a mass of 0.24 M_Jup and radius of 0.79 R_Jup.
Host star metallicity correlates with planet core mass.
Abstract
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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