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. PollaccoD. Queloz, D. Ségransan, B. Smalley, A. H. M. J. Triaud, S. Thompson, O. D. Turner, S. Udry, R. G. West, B. Zouhair

Research output: Contribution to journalArticlepeer-review


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.
Original languageEnglish
Pages (from-to)2467–2474
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Issue number2
Early online date20 Sept 2019
Publication statusPublished - Dec 2019


  • Techniques: photometric
  • Techniques: spectroscopic
  • Planetary systems
  • Stars: rotation


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