WASP-South hot Jupiters : WASP-178b, WASP-184b, WASP-185b & WASP-192b
Date
11/2019Author
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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 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.
Citation
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
Publication
Monthly Notices of the Royal Astronomical Society
Status
Peer reviewed
ISSN
0035-8711Type
Journal article
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Copyright © 2019 the Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at https://doi.org/10.1093/mnras/stz2713
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