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Discovery of WASP-65b and WASP-75b : two hot Jupiters without highly inflated radii

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Gómez Maqueo Chew, Y., Faedi, F., Pollacco, Don, Brown, D. J. A., Doyle, A. P., Collier Cameron, A., Gillon, M., Lendl, M., Smalley, B., Triaud, A. H. M. J. et al.
(2013) Discovery of WASP-65b and WASP-75b : two hot Jupiters without highly inflated radii. Astronomy & Astrophysics, Volume 559 . A36. doi:10.1051/0004-6361/201322314 ISSN 0004-6361.

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Official URL: http://dx.doi.org/10.1051/0004-6361/201322314

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Abstract

We report the discovery of two transiting hot Jupiters, WASP-65b (M_pl = 1.55 +/- 0.16 M_J; R_pl = 1.11 +/- 0.06 R_J), and WASP-75b (M_pl = 1.07 +/- 0.05 M_J; R_pl = 1.27 +/- 0.05 R_J). They orbit their host star every 2.311, and 2.484 days, respectively. The planet host WASP-65 is a G6 star (T_eff = 5600 K, [Fe/H] = -0.07 +/- 0.07, age > 8 Gyr); WASP-75 is an F9 star (T_eff = 6100 K, [Fe/H] = 0.07 +/- 0.09, age of 3 Gyr). WASP-65b is one of the densest known exoplanets in the mass range 0.1 and 2.0 M_J (rho_pl = 1.13 +/- 0.08 rho_J), 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 around 1.5 M_J, a mass regime surprisingly underrepresented among the currently known hot Jupiters. The radius of Jupiter-mass WASP-75b is slightly inflated (< 10%) as compared to theoretical planet models with no core, and has a density similar to that of Saturn (rho_pl = 0.52 +/- 0.06 rho_J).

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Planetary systems, Extrasolar planets, Stars with planets
Journal or Publication Title: Astronomy & Astrophysics
Publisher: EDP Sciences
ISSN: 0004-6361
Official Date: 2013
Dates:
DateEvent
2013Published
Volume: Volume 559
Article Number: A36
DOI: 10.1051/0004-6361/201322314
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 18 April 2016
Date of first compliant Open Access: 18 April 2016
Funder: Science and Technology Facilities Council (Great Britain) (STFC), Fonds national de la recherche scientifique (Belgium) (FNRS), Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung [Swiss National Science Foundation] (SNSF), Vanderbilt Office of the Provost, Seventh Framework Programme (European Commission) (FP7), Qatar National Research Fund (QNRF)
Grant number: FRFC 2.5.594.09.F (FNRS), RG226604 (FP7), NPRP-09-476-1-078 (QNRF), PBGEP2-145594 (SNSF)

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