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WASP-12b: the hottest transiting extrasolar planet yet discovered

Hebb, L.; Collier-Cameron, A.; Loeillet, B.; Pollacco, D.; Hébrard, G.; Street, R.A.; Bouchy, F.; Stempels, H.C.; Moutou, C.; Simpson, E.; Udry, S.; Joshi, Y.C.; West, R.G.; Skillen, I.; Wilson, D.M.; McDonald, I.; Gibson, N.P.; Aigrain, S.; Anderson, D.R.; Benn, C.R.; Christian, D.J.; Enoch, B.; Haswell, C.A.; Hellier, C.; Horne, K.; Irwin, J.; Lister, T.A.; Maxted, P.; Mayor, M.; Norton, A.J.; Parley, N.; Pont, F.; Queloz, D.; Smalley, B. and Wheatley, P.J. (2009). WASP-12b: the hottest transiting extrasolar planet yet discovered. The Astrophysical Journal, 693(2) pp. 1920–1928.

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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.

Item Type: Journal Item
Copyright Holders: 2009 The American Astronomical Society
ISSN: 1538-4357
Extra Information: Click here to view other publications available on this repository relating to the SuperWASP Project.
Keywords: planetary systems; photometric techniques: radial velocities techniques
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 15370
Depositing User: Andrew Norton
Date Deposited: 18 Mar 2009 17:34
Last Modified: 07 Dec 2018 09:21
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