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 seven denser than TrES-4, which is subject to similar stellar insolation, and a factor three 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: M_P = 1.58 +0.13 -0.08 M_J, R_P = 1.090 +0.094 -0.058 R_J and Rho_P = 1.22 +0.19 -0.24 Rho_J. The orbital period is P = 1.6284296 +0.0000048 -0.0000037 d and the mid-transit epoch is T_C (HJD) = 2454375.62466 +0.00026 -0.00025.
@article{arxiv.0801.1685,
title = {WASP-5b: a dense, very-hot Jupiter transiting a 12th-mag Southern-hemisphere star},
author = {D. R. Anderson and M. Gillon and C. Hellier and P. F. L. Maxted and F. Pepe and D. Queloz and D. M. Wilson and A. Collier Cameron and B. Smalley and T. A. Lister and S. J. Bentley and A. Blecha and D. J. Christian and B. Enoch and L. Hebb and K. Horne and J. Irwin and Y. C. Joshi and S. R. Kane and M. Marmier and M. Mayor and N. R. Parley and D. L. Pollacco and F. Pont and R. Ryans and D. Ségransan and I. Skillen and R. A. Street and S. Udry and R. G. West and P. J. Wheatley},
journal= {arXiv preprint arXiv:0801.1685},
year = {2009}
}
Comments
4 pages, 4 figures, 4 tables, submitted to MNRAS Letters. Corrected vsini value and therefore age estimate. Added reference. Corrected error bars in Fig 4. Changed some wording