WASP-167b/KELT-13b : joint discovery of a hot Jupiter transiting a rapidly rotating F1V star
Abstract
We report the joint WASP/KELT discovery of WASP-167b/KELT-13b, a transiting hot Jupiter with a 2.02-d orbit around a V = 10.5, F1V star with [Fe/H] = 0.1 ± 0.1. The 1.5 RJup planet was confirmed by Doppler tomography of the stellar line profiles during transit. We place a limit of <8 MJup on its mass. The planet is in a retrograde orbit with a sky-projected spin–orbit angle of λ = −165° ± 5°. This is in agreement with the known tendency for orbits around hotter stars to be more likely to be misaligned. WASP-167/KELT-13 is one of the few systems where the stellar rotation period is less than the planetary orbital period. We find evidence of non-radial stellar pulsations in the host star, making it a δ-Scuti or γ-Dor variable. The similarity to WASP-33, a previously known hot-Jupiter host with pulsations, adds to the suggestion that close-in planets might be able to excite stellar pulsations.
Citation
Temple , L Y , Hellier , C , Albrow , M D , Anderson , D R , Bayliss , D , Beatty , T G , Bieryla , A , Brown , D J A , Cargile , P A , Collier Cameron , A , Collins , K A , Colón , K D , Curtis , I A , D'Ago , G , Delrez , L , Eastman , J , Gaudi , B S , Gillon , M , Gregorio , J , James , D , Jehin , E , Joner , M D , Kielkopf , J F , Kuhn , R B , Labadie-Bartz , J , Latham , D W , Lendl , M , Lund , M B , Malpas , A L , Maxted , P F L , Myers , G , Oberst , T E , Pepe , F , Pepper , J , Pollacco , D , Queloz , D , Rodriguez , J E , Ségransan , D , Siverd , R J , Smalley , B , Stassun , K G , Stevens , D J , Stockdale , C , Tan , T G , Triaud , A H M J , Udry , S , Villanueva, Jr. , S , West , R G & Zhou , G 2017 , ' WASP-167b/KELT-13b : joint discovery of a hot Jupiter transiting a rapidly rotating F1V star ' , Monthly Notices of the Royal Astronomical Society , vol. 471 , no. 3 , pp. 2743-2752 . https://doi.org/10.1093/mnras/stx1729
Publication
Monthly Notices of the Royal Astronomical Society
Status
Peer reviewed
ISSN
0035-8711Type
Journal article
Collections
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