WASP-South hot Jupiters : WASP-178b, WASP-184b, WASP-185b & WASP-192b
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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 ultrahot 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 per cent) 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.
Hellier , C , Anderson , D R , Barkaoui , K , Benkhaldoun , Z , Bouchy , F , Burdanov , A , Cameron , A C , Delrez , L , Gillon , M , Jehin , E , Nielsen , L D , Maxted , P F L , Pepe , F , Pollacco , D , Pozuelos , F J , Queloz , D , Ségransan , D , Smalley , B , Triaud , A H M J , Turner , O D , Udry , S & West , R G 2019 , ' WASP-South hot Jupiters : WASP-178b, WASP-184b, WASP-185b & WASP-192b ' , Monthly Notices of the Royal Astronomical Society , vol. 490 , no. 1 , pp. 1479–1487 . https://doi.org/10.1093/mnras/stz2713
Monthly Notices of the Royal Astronomical Society
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