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WASP-5b: A dense, very hot Jupiter transiting a 12th-mag Southern-hemisphere star

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posted on 2012-10-24, 09:06 authored by D. R. Anderson, C. Hellier, P. F. L. Maxted, D. M. Wilson, B. Smalley, T. A. Lister, S. J. Bentley, M. Gillon, F. Pepe, D. Queloz, A. Blecha, M. Marmier, M. Mayor, F. Pont, D. Ségransan, S. Udry, A. C. Cameron, L. Hebb, K. Horne, R. A. Street, D. J. Christian, Y. C. Joshi, D. L. Pollacco, R. Ryans, B. Enoch, N. R. Parley, J. Irwin, S. R. Kane, I. Skillen, R. G. West, P. J. Wheatley
We report the discovery of WASP-5b, a Jupiter-mass planet orbiting a 12th-mag G-type star in the Southern hemisphere. The 1.6-d orbital period places WASP-5b in the class of very hot Jupiters and leads to a predicted equilibrium temperature of 1750 K. WASP-5b is the densest of any known Jovian-mass planet, being a factor of 7 denser than TrES-4, which is subject to similar stellar insolation, and a factor of 3 denser than WASP-4b, which has a similar orbital period. We present transit photometry and radial velocity measurements of WASP-5 (= USNO-B1 0487-0799749), from which we derive the mass, radius and density of the planet: MP= 1.58+0.13−0.08 MJ, RP= 1.090+0.094−0.058 RJ and ρP= 1.22+0.19−0.24 ρJ. The orbital period is P= 1.6284296+0.0000048−0.0000037 d and the mid-transit epoch is TC (HJD) = 245 4375.62466+0.00026−0.00025.



Monthly Notices of the Royal Astronomical Society: LETTERS, 2008, 387 (1)


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