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WASP-80b : a gas giant transiting a cool dwarf

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Date
03/2013
Author
Triaud, A.H.M.J.
Anderson, D.R.
Collier Cameron, A.
Doyle, A.P.
Fumel, A.
Gillon, M.
Hellier, C.
Jehin, E.
Lendl, M.
Lovis, C.
Maxted, P.F.L.
Pepe, F.
Pollacco, D.
Queloz, D.
Ségransan, D.
Smalley, B.
Smith, A.M.S.
Udry, S.
West, R.G.
Wheatley, P.J.
Funder
Science & Technology Facilities Council
Science & Technology Facilities Council
Grant ID
ST/J001651/1
PP/F000065/1
Keywords
Planetary systems
Binaries: eclipsing
Stars: individual: WASP-80
Techniques: radial velocities
Techniques: photometric
Techniques: spectroscopic
QB Astronomy
QC Physics
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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.
Citation
Triaud , A H M J , Anderson , D R , Collier Cameron , A , Doyle , A P , Fumel , A , Gillon , M , Hellier , C , Jehin , E , Lendl , M , Lovis , C , Maxted , P F L , Pepe , F , Pollacco , D , Queloz , D , Ségransan , D , Smalley , B , Smith , A M S , Udry , S , West , R G & Wheatley , P J 2013 , ' WASP-80b : a gas giant transiting a cool dwarf ' , Astronomy & Astrophysics , vol. 551 , A80 . https://doi.org/10.1051/0004-6361/201220900
Publication
Astronomy & Astrophysics
Status
Peer reviewed
DOI
https://doi.org/10.1051/0004-6361/201220900
ISSN
0004-6361
Type
Journal article
Rights
© ESO, 2013. Reproduced with permission from Astronomy & Astrophysics, © ESO
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/5482

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