WASP-180Ab : Doppler tomography of an hot Jupiter orbiting the primary star in a visual binary
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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.
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
Monthly Notices of the Royal Astronomical Society
Copyright © 2019 the Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at https://doi.org/10.1093/mnras/stz2632
DescriptionFunding: European Research Council (ERC) under the FP/2007–2013 ERC grant agreement no. 336480; H2020 ERC grant agreement no. 679030.
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