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; Collier Cameron, A; 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; Thompson, S; Triaud, A H M J; Turner, O D; Udry, S; West, R G; Zouhair, B

Abstract

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.

Citation

Temple, L. Y., Hellier, C., Anderson, D. R., Barkaoui, K., Bouchy, F., Brown, D. J. A., Burdanov, A., Collier Cameron, A., 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., …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, 490(2), 2467-2474. https://doi.org/10.1093/mnras/stz2632

• Journal Article Type: Article
• Acceptance Date: Sep 20, 2019
• Online Publication Date: Sep 20, 2019
• Publication Date: Dec 1, 2019
• Publicly Available Date: May 26, 2023
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Electronic ISSN: 1365-2966
• Publisher: Oxford University Press
• Peer Reviewed: Peer Reviewed
• Volume: 490
• Issue: 2
• Pages: 2467-2474
• DOI: https://doi.org/10.1093/mnras/stz2632
• Keywords: techniques: photometric, spectroscopic, planetary systems, stars: rotation
• Public URL: https://keele-repository.worktribe.com/output/413763
• Publisher URL: https://academic.oup.com/mnras/article/490/2/2467/5572277