[en] We report the discovery of WASP-5b, a Jupiter-mass planet orbiting a 12th-mag G-type star in the Southern hemisphere. The 1.6-d orbital period places WASP-5b in the class of very hot Jupiters and leads to a predicted equilibrium temperature of 1750K. WASP-5b is the densest of any known Jovian-mass planet, being a factor of 7 denser than TrES-4, which is subject to similar stellar insolation, and a factor of 3 denser than WASP-4b, which has a similar orbital period. We present transit photometry and radial velocity measurements of WASP-5 (= USNO-B10487-0799749), from which we derive the mass, radius and density of the planet: M[SUB]P[/SUB] = 1.58[SUP]+0.13[/SUP][SUB]-0.08[/SUB]M[SUB]J[/SUB],R[SUB]P[/SUB] = 1.090[SUP]+0.094[/SUP][SUB]-0.058[/SUB]R[SUB]J[/SUB] and rho[SUB]P[/SUB] = 1.22[SUP]+0.19[/SUP][SUB]-0.24[/SUB]rho[SUB]J[/SUB]. The orbital period is P = 1.6284296[SUP]+0.0000048[/SUP][SUB]-0.0000037[/SUB]d and the mid-transit epoch is T[SUB]C[/SUB](HJD) = 2454375.62466[SUP]+0.00026[/SUP][SUB]-0.00025[/SUB].
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Anderson, D. R.; Astrophysics Group, Keele University, Keele ST5 5BG
Gillon, Michaël ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Hellier, C.; Astrophysics Group, Keele University, Keele ST5 5BG
Maxted, P. F. L.; Astrophysics Group, Keele University, Keele ST5 5BG
Pepe, F.; Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland
Queloz, D.; Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland
Wilson, D. M.; Astrophysics Group, Keele University, Keele ST5 5BG
Collier Cameron, A.; School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife KY16 9SS
Smalley, B.; Astrophysics Group, Keele University, Keele ST5 5BG
Lister, T. A.; Astrophysics Group, Keele University, Keele ST5 5BG ; Las Cumbres Observatory, 6740 Cortona Dr. Suite 102, Santa Barbara, CA 93117, USA
Bentley, S. J.; Astrophysics Group, Keele University, Keele ST5 5BG
Blecha, A.; Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland
Christian, D. J.; Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast BT7 1NN
Enoch, B.; Department of Physics and Astronomy, The Open University, Milton Keynes MK7 6AA
Hebb, L.; School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife KY16 9SS
Horne, K.; School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife KY16 9SS
Irwin, J.; Department of Astronomy, Harvard University, 60 Garden Street, MS 10, Cambridge, MA 02138, USA
Joshi, Y. C.; Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast BT7 1NN
Kane, S. R.; Michelson Science Center, Caltech, MS 100-22, 770 South Wilson Avenue, Pasadena, CA 91125, USA
Marmier, M.; Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland
Mayor, M.; Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland
Parley, N. R.; Department of Physics and Astronomy, The Open University, Milton Keynes MK7 6AA
Pollacco, D. L.; Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast BT7 1NN
Pont, F.; Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland
Ryans, R.; Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast BT7 1NN
Ségransan, D.; Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland
Skillen, I.; Isaac Newton Group of Telescopes, Apartado de Correos 321, E-38700 Santa Cruz de la Palma, Tenerife, Spain
Street, R. A.; Las Cumbres Observatory, 6740 Cortona Dr. Suite 102, Santa Barbara, CA 93117, USA ; Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast BT7 1NN ; Department of Physics, Broida Hall, University of California, Santa Barbara, CA 93106-9530, USA
Udry, S.; Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland
West, R. G.; Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH
Wheatley, P. J.; Department of Physics, University of Warwick, Coventry CV4 7AL
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