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Title:
Wasp-7: A Bright Transiting-Exoplanet System in the Southern Hemisphere
Authors:
Hellier, Coel; Anderson, D. R.; Gillon, M.; Lister, T. A.; Maxted, P. F. L.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; West, R. G.; Wilson, D. M.; Alsubai, K.; Bentley, S. J.; Cameron, A. Collier; Hebb, L.; Horne, K.; Irwin, J.; Kane, S. R.; Mayor, M.; Pepe, F.; Pollacco, D.; Skillen, I.; Udry, S.; Wheatley, P. J.; Christian, D. J.; Enoch, R.; Haswell, C. A.; Joshi, Y. C.; Norton, A. J.; Parley, N.; Ryans, R.; Street, R. A.; Todd, I.
Affiliation:
AA(Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK ), AB(Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK ), AC(Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland ), AD(Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK ; Las Cumbres Observatory, 6740 Cortona Dr. Suite 102, Santa Barbara, CA 93117, USA ), AE(Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK ), AF(Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland ), AG(Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK ), AH(Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland ), AI(Department of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK ), AJ(Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK ), AK(School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife, KY16 9SS, UK ), AL(Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK ), AM(School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife, KY16 9SS, UK ), AN(School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife, KY16 9SS, UK ), AO(School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife, KY16 9SS, UK ), AP(Department of Astronomy, Harvard University, 60 Garden Street, MS 10, Cambridge, Massachusetts 02138, USA ), AQ(Michelson Science Center, Caltech, MS 100-22, 770 South Wilson Avenue, Pasadena, CA 91125, USA ), AR(Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland ), AS(Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland ), AT(Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast, BT7 1NN, UK ), AU(Isaac Newton Group of Telescopes, Apartado de Correos 321, E-38700 Santa Cruz de la Palma, Tenerife, Spain ), AV(Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland ), AW(Department of Physics, University of Warwick, Coventry, CV4 7AL, UK ), AX(Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast, BT7 1NN, UK ), AY(Department of Physics and Astronomy, The Open University, Milton Keynes, MK7 6AA, UK; School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife, KY16 9SS, UK ), AZ(Department of Physics and Astronomy, The Open University, Milton Keynes, MK7 6AA, UK), BA(Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast, BT7 1NN, UK ), BB(Department of Physics and Astronomy, The Open University, Milton Keynes, MK7 6AA, UK), BC(Department of Physics and Astronomy, The Open University, Milton Keynes, MK7 6AA, UK), BD(Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast, BT7 1NN, UK ), BE(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, UK ), BF(Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast, BT7 1NN, UK )
Publication:
The Astrophysical Journal Letters, Volume 690, Issue 1, pp. L89-L91 (2009). (ApJL Homepage)
Publication Date:
01/2009
Origin:
IOP
ApJ Keywords:
stars: individual: WASP-7 HD 197286, planetary systems
DOI:
10.1088/0004-637X/690/1/L89
Bibliographic Code:
2009ApJ...690L..89H

Abstract

We report that a Jupiter-mass planet, WASP-7b, transits the V = 9.5 star HD 197286 every 4.95 d. This is the brightest discovery from the WASP-South transit survey so far and is currently the brightest transiting-exoplanet system in the southern hemisphere. WASP-7b is among the densest of the known Jupiter-mass planets, suggesting that it has a massive core. The planet mass is 0.96+0.12 -0.18 M Jup, the radius is 0.915+0.046 -0.040 R Jup, and the density is 1.26+0.25 -0.21 ρJup (1.67+0.33 -0.28 g cm-3).
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