[en] We report the discovery and characterisation 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 M[SUB]Jup[/SUB], 1.24 ± 0.04 R[SUB]Jup[/SUB] planet to be in a misaligned, retrograde orbit around an F7 star with T[SUB]eff[/SUB] = 6500 K and a moderate rotation speed of vsin i[SUB]⋆[/SUB] = 19.9 km s[SUP]-1[/SUP]. The host star is the primary of a V = 10.7 binary, where a secondary separated by ̃5″ (̃1200 AU) contributes ̃ 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.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Temple, L. Y.; Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
Hellier, C.; Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
Anderson, D. R.; Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
Barkaoui, K.; Space sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, Allée du 6 Août 17, 4000 Liège, Belgium ; Oukaïmden Observatory, High Energy Physics and Astrophysics Laboratory, Cadi Ayyad University, Marrakech, Morocco
Bouchy, F.; Observatoire astronomique de l'Université de Genève 51 ch. des Maillettes, 1290 Sauverny, Switzerland
Brown, D. J. A.; Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK ; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
Burdanov, Artem ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic
Cameron, A. Collier; SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife, KY16 9SS, UK
Nielsen, L. D.; Observatoire astronomique de l'Université de Genève 51 ch. des Maillettes, 1290 Sauverny, Switzerland
Pepe, F.; Observatoire astronomique de l'Université de Genève 51 ch. des Maillettes, 1290 Sauverny, Switzerland
Pollacco, D.; Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK ; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
Triaud, A. H. M. J.; School of Physics & Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
Turner, O. D.; Observatoire astronomique de l'Université de Genève 51 ch. des Maillettes, 1290 Sauverny, Switzerland ; Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
Udry, S.; Observatoire astronomique de l'Université de Genève 51 ch. des Maillettes, 1290 Sauverny, Switzerland
West, R. G.; Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK
Zouhair, B.; Oukaïmden Observatory, High Energy Physics and Astrophysics Laboratory, Cadi Ayyad University, Marrakech, Morocco)
