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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. Segransan, I. Skillen, R. A. Street, S. Udry, R. G. West, P. J. Wheatley

Research output: Contribution to journalArticlepeer-review

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 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(-0.08)(+0.13) M-J, R-P = 1.090(-0.058)(+0.094) R-J and rho P = 1.22(-0.24)(+0.19) rho J. The orbital period is P = 1.6284296(-0.0000037)(+0.0000048) d and the mid-transit epoch is T-C (HJD) = 245 4375.62466(-0.00025)(+0.00026).

Original languageEnglish
Pages (from-to)L4-L7
Number of pages4
JournalMonthly Notices of the Royal Astronomical Society
Volume387
Issue number1
Early online date3 Apr 2008
DOIs
Publication statusPublished - 11 Jun 2008

Keywords

  • stars: individual: WASP-5
  • planetary systems
  • LIGHT CURVES
  • ATMOSPHERE
  • PLANET
  • MASS

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