Volume 501, Number 2, July II 2009
|Page(s)||785 - 792|
|Section||Planets and planetary systems|
|Published online||13 May 2009|
Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star *,**
Institut d'Astrophysique et de Géophysique, Université de Liège, Allée du 6 Août 17, Bât. B5C, Liège 1, Belgium e-mail: email@example.com
2 Observatoire de Genève, Université de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
3 Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
4 Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast, BT7 1NN, UK
5 Department of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK
6 School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife, KY16 9SS, UK
7 Department of Astronomy, Harvard University, 60 Garden Street, MS 10, Cambridge, Massachusetts 02138, USA
8 Las Cumbres Observatory, 6740 Cortona Dr. Suite 102, Santa Barbara, CA 93117, USA
9 Department of Physics, University of Warwick, Coventry, CV4 7AL, UK
Accepted: 4 May 2009
We report the discovery of WASP-6b, an inflated sub-Jupiter mass planet transiting every days a mildly metal-poor solar-type star of magnitude . A combined analysis of the WASP photometry, high-precision followup transit photometry and radial velocities yield a planetary mass MJ and radius RJ, resulting in a density . The mass and radius for the host star are and . The non-zero orbital eccentricity 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 deg. In addition to similar published measurements, this result favors a dominant migration mechanism based on tidal interactions with a protoplanetary disk.
Key words: binaries: eclipsing / stars: individual: WASP-6 / planetary systems / techniques: photometric / techniques: radial velocities / techniques: spectroscopic
Based on data collected with the HARPS spectrograph at ESO La Silla Observatory in the programs 082.C-0040(E) and 082.C-0608.
© ESO, 2009
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.