Discovery of WASP-65b and WASP-75b: Two Hot Jupiters Without Highly Inflated Radii

[en] We report the discovery of two transiting hot Jupiters, WASP-65b (Mpl = 1.55 ± 0.16 MJ; Rpl = 1.11 ± 0.06 RJ), and WASP-75b (Mpl = 1.07 ± 0.05 MJ; Rpl = 1.27 ± 0.05 RJ). They orbit their host star every ~2.311, and ~2.484 days, respectively. The planet host WASP-65 is a G6 star (Teff = 5600 K, [Fe/H] = -0.07 ± 0.07, age ≳8 Gyr); WASP-75 is an F9 star (Teff = 6100 K, [Fe/H] = 0.07 ± 0.09, age ~ 3 Gyr). WASP-65b is one of the densest known exoplanets in the mass range 0.1 and 2.0 MJ (rhopl = 1.13 ± 0.08 rhoJ), a mass range where a large fraction of planets are found to be inflated with respect to theoretical planet models. WASP-65b is one of only a handful of planets with masses of ~1.5 MJ, a mass regime surprisingly underrepresented among the currently known hot Jupiters. The radius of WASP-75b is slightly inflated (≲10%) as compared to theoretical planet models with no core, and has a density similar to that of Saturn (rhopl = 0.52 ± 0.06 rhoJ).

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Gómez Maqueo Chew, Y.

Faedi, F.

Pollacco, D.

Brown, D. J. A.

Doyle, A. P.

Collier Cameron, A.

Gillon, Michaël ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa)

Lendl, M.

Smalley, B.

Triaud, A. H. M. J.

More authors (31 more)

Language :

English

Title :

Discovery of WASP-65b and WASP-75b: Two Hot Jupiters Without Highly Inflated Radii

Publication date :

November 2013

Journal title :

Astronomy and Astrophysics

ISSN :

0004-6361

eISSN :

1432-0746

Publisher :

EDP Sciences, Les Ulis, France

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://adsabs.harvard.edu/abs/2013A%26A...559A..36G

Available on ORBi :

since 11 October 2013

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