Journal Article

WASP-10b: a 3M<sub><i>J</i></sub>, gas-giant planet transiting a late-type K star

D. J. Christian, N. P. Gibson, E. K. Simpson, R. A. Street, I. Skillen, D. Pollacco, A. Collier Cameron, Y. C. Joshi, F. P. Keenan, H. C. Stempels, C. A. Haswell, K. Horne, D. R. Anderson, S. Bentley, F. Bouchy, W. I. Clarkson, B. Enoch, L. Hebb, G. Hébrard, C. Hellier, J. Irwin, S. R. Kane, T. A. Lister, B. Loeillet, P. Maxted, M. Mayor, I. McDonald, C. Moutou, A. J. Norton, N. Parley, F. Pont, D. Queloz, R. Ryans, B. Smalley, A. M. S. Smith, I. Todd, S. Udry, R. G. West, P. J. Wheatley and D. M. Wilson

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 392, issue 4, pages 1585-1590
Published in print February 2009 | ISSN: 0035-8711
Published online January 2009 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2008.14164.x
WASP-10b: a 3MJ, gas-giant planet transiting a late-type K star

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We report the discovery of WASP-10b, a new transiting extrasolar planet (ESP) discovered by the Wide Angle Search for Planets (WASP) Consortium and confirmed using Nordic Optical Telescope FIbre-fed Echelle Spectrograph and SOPHIE radial velocity data. A 3.09-d period, 29 mmag transit depth and 2.36 h duration are derived for WASP-10b using WASP and high-precision photometric observations. Simultaneous fitting to the photometric and radial velocity data using a Markov Chain Monte Carlo procedure leads to a planet radius of 1.28RJ, a mass of 2.96MJ and eccentricity of ≈0.06. WASP-10b is one of the more massive transiting ESPs, and we compare its characteristics to the current sample of transiting ESP, where there is currently little information for masses greater than ≈2MJ and non-zero eccentricities. WASP-10's host star, GSC 2752−00114 (USNO-B1.0 1214−0586164) is among the fainter stars in the WASP sample, with V= 12.7 and a spectral type of K5. This result shows promise for future late-type dwarf star surveys.

Keywords: methods: data analysis; techniques: photometric; techniques: radial velocities; stars: planetary systems

Journal Article.  3265 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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