Reference : Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transi...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/27336
Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star
English
Gillon, Michaël mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Anderson, D. R. [Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK]
Triaud, A H M J [Observatoire de Genève, Université de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland]
Hellier, C. [Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK]
Maxted, P. F. L. [Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK]
Pollaco, D. [Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast, BT7 1NN, UK]
Queloz, D. [Observatoire de Genève, Université de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland]
Smalley, B. [Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK]
West, R. G. [Department of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK]
Wilson, D. M. [Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK]
Bentley, S. J. [Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK]
Collier Cameron, A. [School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife, KY16 9SS, UK]
Enoch, B. [School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife, KY16 9SS, UK]
Hebb, L. [School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife, KY16 9SS, UK]
Horne, K. [School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife, KY16 9SS, UK]
Irwin, J. [Department of Astronomy, Harvard University, 60 Garden Street, MS 10, Cambridge, Massachusetts 02138, USA]
Joshi, Y. C. [Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast, BT7 1NN, UK]
Lister, T. A. [Las Cumbres Observatory, 6740 Cortona Dr. Suite 102, Santa Barbara, CA 93117, USA]
Mayor, M. [Observatoire de Genève, Université de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland]
Pepe, F. [Observatoire de Genève, Université de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland]
Parley, N. [Department of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK]
Segransan, D. [Observatoire de Genève, Université de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland]
Udry, S. [Observatoire de Genève, Université de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland]
Wheatley, P. J. [Department of Physics, University of Warwick, Coventry, CV4 7AL, UK]
1-Jul-2009
Astronomy and Astrophysics
EDP Sciences
501
785-792
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] binaries: eclipsing ; stars: individual: WASP-6 ; planetary systems ; techniques: photometric ; techniques: radial velocities ; techniques: spectroscopic
[en] We report the discovery of WASP-6b, an inflated sub-Jupiter mass planet transiting every 3.3610060[SUP]+ 0.0000022 [/SUP][SUB]- 0.0000035 [/SUB] days a mildly metal-poor solar-type star of magnitude V = 11.9. A combined analysis of the WASP photometry, high-precision followup transit photometry and radial velocities yield a planetary mass M[SUB]p[/SUB] = 0.503[SUP]+0.019[/SUP][SUB]-0.038[/SUB] M[SUB]J[/SUB] and radius R[SUB]p[/SUB] = 1.224[SUP]+0.051[/SUP][SUB]-0.052[/SUB] R_J, resulting in a density rho[SUB]p[/SUB] = 0.27 ± 0.05 rho_J. The mass and radius for the host star are M_ast = 0.88[SUP]+0.05[/SUP][SUB]-0.08[/SUB] M_o and R_ast = 0.870[SUP]+0.025[/SUP][SUB]-0.036[/SUB] R_o. The non-zero orbital eccentricity e = 0.054^+0.018[SUB]-0.015[/SUB] that we measure suggests that the planet underwent a massive tidal heating 1 Gyr ago that could have contributed to its inflated radius. High-precision radial velocities obtained during a transit allow us to measure a sky-projected angle between the stellar spin and orbital axis beta = 11[SUP]+14[/SUP][SUB]-18[/SUB] deg. In addition to similar published measurements, this result favors a dominant migration mechanism based on tidal interactions with a protoplanetary disk. Based on data collected with the HARPS spectrograph at ESO La Silla Observatory in the programs 082.C-0040(E) and 082.C-0608. The photometric time-series and radial velocities (Tables 4, 5) used in this work are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/501/785
http://hdl.handle.net/2268/27336
10.1051/0004-6361/200911749
http://adsabs.harvard.edu/abs/2009A%26A...501..785G
http://de.arxiv.org/abs/0901.4705

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