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

D. R. Anderson; M. Gillon; C. Hellier; P. F. L. Maxted; F. Pepe; D. Queloz; D. M. Wilson; A. Collier Cameron; B. Smalley; T. A. Lister; S. J. Bentley; A. Blecha; D. J. Christian; B. Enoch; L. Hebb; K. Horne; J. Irwin; Y. C. Joshi; S. R. Kane; M. Marmier; M. Mayor; N. R. Parley; D. L. Pollacco; F. Pont; R. Ryans; D. Ségransan; I. Skillen; R. A. Street; S. Udry; R. G. West; P. J. Wheatley

doi:10.1111/j.1745-3933.2008.00465.x

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arXiv · 0801.1685

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

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Abstract

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.

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D. R. Anderson, M. Gillon, C. Hellier, P. F. L. Maxted, F. Pepe, D. Queloz, D. M. Wilson, A. Collier Cameron, B. Smalley, T. A. Lister, S. J. Bentley, A. Blecha, D. J. Christian, B. Enoch, L. Hebb, K. Horne, J. Irwin, Y. C. Joshi, S. R. Kane, M. Marmier, M. Mayor, N. R. Parley, D. L. Pollacco, F. Pont, R. Ryans, D. Ségransan, I. Skillen, R. A. Street, S. Udry, R. G. West, P. J. Wheatley. 2008-02-22. WASP-5b: a dense, very-hot Jupiter transiting a 12th-mag Southern-hemisphere star. https://doi.org/10.1111/j.1745-3933.2008.00465.x

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