(2013) WASP-80b : a gas giant transiting a cool dwarf. Astronomy & Astrophysics, Volume 551 . Article number A80. doi:10.1051/0004-6361/201220900

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Abstract

We report the discovery of a planet transiting the star WASP-80 (1SWASP J201240.26-020838.2; 2MASS J20124017-0208391; TYC 5165-481-1; BPM 80815; V = 11.9, K = 8.4). Our analysis shows this is a 0.55 ± 0.04 Mjup, 0.95 ± 0.03 Rjup gas giant on a circular 3.07 day orbit around a star with a spectral type between K7V and M0V. This system produces one of the largest transit depths so far reported, making it a worthwhile target for transmission spectroscopy. We find a large discrepancy between the vsini⋆  inferred from stellar line broadening and the observed amplitude of the Rossiter-McLaughlin effect. This can be understood either by an orbital plane nearly perpendicular to the stellar spin or by an additional, unaccounted for source of broadening.

Item Type:	Journal Article
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	Astronomy & Astrophysics
Publisher:	EDP Sciences
ISSN:	0004-6361
Official Date:	March 2013
Dates:	Date Event March 2013 Published
Volume:	Volume 551
Page Range:	Article number A80
DOI:	10.1051/0004-6361/201220900
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Swiss National Science Foundation , Belgian Fund for Scientific Research (Fond National de la Recherche Scientifique, F.R. SFNRS) , Swiss National Science Foundation (SNF), National Aeronautics and Space Administration, National Science Foundation
Grant number:	FRFC 2.5.594.09.F (F.R. SFNRS)

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