WASP-180Ab : Doppler tomography of an hot Jupiter orbiting the primary star in a visual binary
Abstract
We report the discovery and characterization of WASP-180Ab, a hot Jupiter confirmed by the detection of its Doppler shadow and by measuring its mass using radial velocities. We find the 0.9 ± 0.1 MJup, 1.24 ± 0.04 RJup planet to be in a misaligned, retrograde orbit around an F7 star with Teff = 6500 K and a moderate rotation speed of vsin i⋆ = 19.9 km s−1. The host star is the primary of a V = 10.7 binary, where a secondary separated by ∼5 arcsec (∼1200 au) contributes ∼ 30 per cent of the light. WASP-180Ab therefore adds to a small sample of transiting hot Jupiters known in binary systems. A 4.6-d modulation seen in the WASP data is likely to be the rotational modulation of the companion star, WASP-180B.
Citation
Temple , L Y , Hellier , C , Anderson , D R , Barkaoui , K , Bouchy , F , Brown , D J A , Burdanov , A , Cameron , A C , Delrez , L , Ducrot , E , Evans , D , Gillon , M , Jehin , E , Lendl , M , Maxted , P F L , McCormac , J , Murray , C , Nielsen , L D , Pepe , F , Pollacco , D , Queloz , D , Ségransan , D , Smalley , B , Triaud , A H M J , Thompson , S , Turner , O D , Udry , S , West , R G & Zouhair , B 2019 , ' WASP-180Ab : Doppler tomography of an hot Jupiter orbiting the primary star in a visual binary ' , Monthly Notices of the Royal Astronomical Society , vol. 490 , no. 2 , pp. 2467–2474 . https://doi.org/10.1093/mnras/stz2632
Publication
Monthly Notices of the Royal Astronomical Society
Status
Peer reviewed
ISSN
0035-8711Type
Journal article
Description
Funding: European Research Council (ERC) under the FP/2007–2013 ERC grant agreement no. 336480; H2020 ERC grant agreement no. 679030.Collections
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