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Title:
WASP-5b: a dense, very hot Jupiter transiting a 12th-mag Southern-hemisphere star
Authors:
Anderson, D. R.; Gillon, M.; Hellier, C.; Maxted, P. F. L.; Pepe, F.; Queloz, D.; Wilson, D. M.; Collier Cameron, A.; Smalley, B.; Lister, T. A.; Bentley, S. J.; Blecha, A.; Christian, D. J.; Enoch, B.; Hebb, L.; Horne, K.; Irwin, J.; Joshi, Y. C.; Kane, S. R.; Marmier, M.; Mayor, M.; Parley, N. R.; Pollacco, D. L.; Pont, F.; Ryans, R.; Ségransan, D.; Skillen, I.; Street, R. A.; Udry, S.; West, R. G.; Wheatley, P. J.
Affiliation:
AA(Astrophysics Group, Keele University, Keele ST5 5BG), AB(Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland; Institut d'Astrophysique et de Géophysique, Université de Liège, 4000 Liège, Belgium), AC(Astrophysics Group, Keele University, Keele ST5 5BG), AD(Astrophysics Group, Keele University, Keele ST5 5BG), AE(Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland), AF(Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland), AG(Astrophysics Group, Keele University, Keele ST5 5BG), AH(School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife KY16 9SS), AI(Astrophysics Group, Keele University, Keele ST5 5BG), AJ(Astrophysics Group, Keele University, Keele ST5 5BG; Las Cumbres Observatory, 6740 Cortona Dr. Suite 102, Santa Barbara, CA 93117, USA), AK(Astrophysics Group, Keele University, Keele ST5 5BG), AL(Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland), AM(Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast BT7 1NN), AN(Department of Physics and Astronomy, The Open University, Milton Keynes MK7 6AA), AO(School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife KY16 9SS), AP(School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife KY16 9SS), AQ(Department of Astronomy, Harvard University, 60 Garden Street, MS 10, Cambridge, MA 02138, USA), AR(Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast BT7 1NN), AS(Michelson Science Center, Caltech, MS 100-22, 770 South Wilson Avenue, Pasadena, CA 91125, USA), AT(Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland), AU(Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland), AV(Department of Physics and Astronomy, The Open University, Milton Keynes MK7 6AA), AW(Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast BT7 1NN), AX(Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland), AY(Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast BT7 1NN), AZ(Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland), BA(Isaac Newton Group of Telescopes, Apartado de Correos 321, E-38700 Santa Cruz de la Palma, Tenerife, Spain), BB(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), BC(Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland), BD(Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH), BE(Department of Physics, University of Warwick, Coventry CV4 7AL)
Publication:
Monthly Notices of the Royal Astronomical Society: Letters, Volume 387, Issue 1, pp. L4-L7. (MNRAS Homepage)
Publication Date:
06/2008
Origin:
MNRAS
MNRAS Keywords:
stars: individual: WASP-5, planetary systems
DOI:
10.1111/j.1745-3933.2008.00465.x
Bibliographic Code:
2008MNRAS.387L...4A

Abstract

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: MP = 1.58+0.13-0.08MJ,RP = 1.090+0.094-0.058RJ and ρP = 1.22+0.19-0.24ρJ. The orbital period is P = 1.6284296+0.0000048-0.0000037d and the mid-transit epoch is TC(HJD) = 2454375.62466+0.00026-0.00025.
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