Volume 593, September 2016
|Number of page(s)||9|
|Section||Planets and planetary systems|
|Published online||03 October 2016|
WASP-113b and WASP-114b, two inflated hot Jupiters with contrasting densities
1 Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal
2 Aix-Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique de Marseille) UMR 7326, 13388 Marseille, France
3 Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK
4 Institut d’Astrophysique de Paris, UMR 7095 CNRS, Université Pierre & Marie Curie, 98bis boulevard Arago, 75014 Paris, France
5 Observatoire de Haute-Provence, Université d’Aix-Marseille & CNRS, 04870 Saint-Michel l’ Observatoire, France
6 Instituto de Astronomía, Universidad Nacional Autónoma de México, 04510 Ciudad Universitaria, Mexico
7 Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK
8 Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, 15236 Penteli, Greece
9 Institut d’Astrophysique et de Geophysique, Université de Liège, Allée du 6 Août, 17, Bât. B5C, Liège 1, Belgium
10 SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife KY16 9SS, UK
11 Lowell Observatory, 1400 W Mars Hill Rd. Flagstaff, AZ 86001, USA
12 Space Research Institute, Austrian Academy of Sciences, Schmiedlstr. 6, 8042 Graz, Austria
13 OverSky, 47 allée des Palanques, BP 12, 33127 Saint-Jean d’Illac, France
14 Jodrell Bank Centre for Astrophysics, University of Manchester, Oxford Rd., Manchester, M13 9PL, UK
15 Observatoire de Genève, Université de Genève, 51 chemin des Maillettes, 1290 Sauverny, Switzerland
16 Instituto de Astronomía, Universidad Nacional Autónoma de México, 22860 Ensenada, Baja California, Mexico
17 Cavendish Laboratory, J J Thomson Avenue, Cambridge, CB3 0HE, UK
18 Centre for Planetary Sciences, University of Toronto at Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada
19 Department of Astronomy & Astrophysics, University of Toronto, Toronto, ON M5S 3H4, Canada
20 Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, UK
21 Astrophysics Research Centre, School of Mathematics & Physics, Queen’s University Belfast, University Road, Belfast, BT7 1NN, UK
Received: 12 May 2015
Accepted: 4 July 2016
Aims. We present the discovery and characterisation of the exoplanets WASP-113b and WASP-114b by the WASP surveys, SOPHIE and CORALIE.
Methods. The planetary nature of the systems was established by performing follow-up photometric and spectroscopic observations. The follow-up data were combined with the WASP-photometry and analysed with an MCMC code to obtain system parameters.
Results. The host stars WASP-113 and WASP-114 are very similar. They are both early G-type stars with an effective temperature of ~5900 K, [Fe/H] ~ 0.12, and log g~ 4.1 dex. However, WASP-113 is older than WASP-114. Although the planetary companions have similar radii, WASP-114b is almost four times heavier than WASP-113b. WASP-113b has a mass of 0.48 MJup and an orbital period of ~4.5 days; WASP-114b has a mass of 1.77 MJup and an orbital period of ~1.5 days. Both planets have inflated radii, in particular WASP-113 with a radius anomaly of ℜ = 0.35. The high scale height of WASP-113b (~950 km) makes it a good target for follow-up atmospheric observations.
Key words: planets and satellites: detection / stars: individual: WASP-113 / stars: individual: WASP-114 / techniques: radial velocities / techniques: photometric
© ESO, 2016
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