Hellier, C ORCID: https://orcid.org/0000-0002-3439-1439, Anderson, DR, Barkaoui, K, Benkhaldoun, Z, Bouchy, F, Burdanov, A, Cameron, AC, Delrez, L, Gillon, M, Jehin, E, Nielsen, LD, Maxted, PFL ORCID: https://orcid.org/0000-0003-3794-1317, Pepe, F, Pollacco, D, Pozuelos, FJ, Queloz, D, Ségransan, D, Smalley, B ORCID: https://orcid.org/0000-0002-3456-087X, Triaud, AHMJ, Turner, OD, Udry, S and West, RG (2019) WASP-South hot Jupiters: WASP-178b, WASP-184b, WASP-185b & WASP-192b. Monthly Notices of the Royal Astronomical Society.

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Abstract

We report on four new transiting hot Jupiters discovered by the WASP-South survey. WASP-178b transits a V = 9.9, A1V star with Teff = 9350 ± 150 K, the second-hottest transit host known. It has a highly bloated radius of 1.81 ± 0.09 RJup, in line with the known correlation between high irradiation and large size. With an estimated temperature of 2470 ± 60 K, the planet is one of the best targets for studying ultra-hot Jupiters that is visible from the Southern hemisphere. The three host stars WASP-184, WASP-185 and WASP-192 are all post-main-sequence G0 stars of ages 4–8 Gyr. The larger stellar radii (1.3–1.7 M⊙) mean that the transits are relatively shallow (0.7–0.9%) even though the planets have moderately inflated radii of 1.2–1.3 RJup. WASP-185b has an eccentric orbit (e = 0.24) and a relatively long orbital period of 9.4 d. A star that is 4.6 arcsec from WASP-185 and 4.4 mag fainter might be physically associated.

Item Type: Article
Subjects: Q Science > QB Astronomy > QB799 Stars
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Depositing User: Symplectic
Date Deposited: 04 Oct 2019 14:14
Last Modified: 04 Oct 2019 14:14
URI: http://eprints.keele.ac.uk/id/eprint/6986

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