WASP-12b: THE HOTTEST TRANSITING EXTRASOLAR PLANET YET DISCOVERED

Leslie Hebb; A. Collier Cameron; B. Loeillet; D. Pollacco; G. Hébrard; R. A. Street; F. Bouchy; H. C. Stempels; C. Moutou; E. K. Simpson; S. Udry; Y. C. Joshi; R. G. West; I. Skillen; David M. Wilson; Iain McDonald; Neale P. Gibson; S. Aigrain; D. R. Anderson; Chris Benn; D. J. Christian; B. Enoch; C. A. Haswell; C. Hellier; K. Horne; Jonathan Irwin; Tim Lister; P. F. L. Maxted; M. Mayor; A. J. Norton; N. Parley; F. Pont; D. Queloz; B. Smalley; P. J. Wheatley

doi:10.1088/0004-637x/693/2/1920

WASP-12b: THE HOTTEST TRANSITING EXTRASOLAR PLANET YET DISCOVERED

Leslie Hebb(University of St Andrews), A. Collier Cameron(University of St Andrews), B. Loeillet(Laboratoire d’Astrophysique de Marseille), D. Pollacco(Queen's University Belfast), G. Hébrard(Centre National de la Recherche Scientifique), R. A. Street(Las Cumbres Observatory Global Telescope Network), F. Bouchy(Centre National de la Recherche Scientifique), H. C. Stempels(University of St Andrews), C. Moutou(Laboratoire d’Astrophysique de Marseille), E. K. Simpson(Queen's University Belfast), S. Udry(University of Geneva), Y. C. Joshi(Queen's University Belfast), R. G. West(University of Leicester), I. Skillen(Isaac Newton Group), David M. Wilson(Keele University), Iain McDonald(Keele University), Neale P. Gibson(Queen's University Belfast), S. Aigrain(University of Exeter), D. R. Anderson(Keele University), Chris Benn(Isaac Newton Group), D. J. Christian(Queen's University Belfast), B. Enoch(University of St Andrews), C. A. Haswell(The Open University), C. Hellier(Keele University), K. Horne(University of St Andrews), Jonathan Irwin(Center for Astrophysics Harvard & Smithsonian), Tim Lister(Las Cumbres Observatory Global Telescope Network), P. F. L. Maxted(Keele University), M. Mayor(University of Geneva), A. J. Norton(The Open University), N. Parley(University of St Andrews), F. Pont(University of Exeter), D. Queloz(University of Geneva), B. Smalley(Keele University), P. J. Wheatley(University of Warwick)

The Astrophysical Journal

March 10, 2009

10.1088/0004-637x/693/2/1920

Cited by 405Open Access

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Abstract

We report on the discovery of WASP-12b, a new transiting extrasolar planet with R pl = 1.79+0.09 -0.09 RJ and M pl = 1.41+0.10 -0.10 M J. The planet and host star properties were derived from a Monte Carlo Markov Chain analysis of the transit photometry and radial velocity data. Furthermore, by comparing the stellar spectrum with theoretical spectra and stellar evolution models, we determined that the host star is a supersolar metallicity ([M/H] = 0.3+0.05 -0.15), late-F (T eff = 6300+200 -100 K) star which is evolving off the zero-age main sequence. The planet has an equilibrium temperature of T eq = 2516 K caused by its very short period orbit (P = 1.09 days) around the hot, twelfth magnitude host star. WASP-12b has the largest radius of any transiting planet yet detected. It is also the most heavily irradiated and the shortest period planet in the literature.

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