WASP-180Ab:Doppler tomography of an hot Jupiter orbiting the primary star in a visual binary
- Temple, L. Y.
- Hellier, C.
- Anderson, D. R.
- Barkaoui, K.
- Bouchy, F.
- Brown, D. J. A.
- Burdanov, A.
- Cameron, A. Collier
- 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.
Publication date
December 2019
DOIAbstract
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
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