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29 March 2024
 
  » arxiv » 1903.8002

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WASP-180Ab: Doppler tomography of an hot Jupiter orbiting the primary star in a visual binary
L.Y. Temple ; C. Hellier ; D.R. Anderson ; K. Barkaoui ; F. Bouchy ; D.J.A. Brown ; A. Burdanov ; A. Collier Cameron ; L. Delrez ; E. Ducrot ; D. Evans ; M. Gillon ; E. Jehin ; M. Lendl ; P.F.L. Maxted ; J. McCormac ; C. Murray ; L. D. Nielsen ; F. Pepe ; D. Pollacco ; D. Queloz ; D. Ségransan ; B. Smalley ; S. Thompson ; A.H.M.J. Triaud ; O.D. Turner ; S. Udry ; R.G. West ; B. Zouhair ;
Date 19 Mar 2019
AbstractWe report the discovery and parametrisation 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 0.8 $pm$ 0.1 $M_{ m Jup}$, 1.29 $pm$ 0.07 $R_{ m Jup}$ planet to be in a misaligned, retrograde orbit around an F7 star with $T_{ m eff}$ = 6500K and a moderate rotation speed of vsini = 21 km s$^{-1}$. The host star is the primary of a $V$ = 10.7 binary, where a secondary separated by 5$’’$ contributes $sim$30% of the light. WASP-180Ab therefore adds to a small sample of transiting hot Jupiters known in binary systems. A 4.6-day modulation seen in the WASP data is likely to be the rotational modulation of the companion star, WASP-180B.
Source arXiv, 1903.8002
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