WASP-3b: a strongly irradiated transiting gas-giant planet

• DOI: 10.1111/j.1365-2966.2008.12939.x
• Publication Date: 2008-03-11T04:18:01Z
• Authors: D. Pollacco; I. Skillen; A. Collier Cameron; B. Loeillet; H. C. Stempels; F. Bouchy; N. P. Gibson; L. Hebb; G. Hébrard; Y. C. Joshi; I. McDonald; B. Smalley; A. M. S. Smith; R. A. Street; S. Udry; R. G. West; D. M. Wilson; P. J. Wheatley; S. Aigrain; K. Alsubai; C. R. Benn; V. A. Bruce; D. J. Christian; W. I. Clarkson; B. Enoch; A. Evans; A. Fitzsimmons; C. A. Haswell; C. Hellier; S. Hickey; S. T. Hodgkin; K. Horne; M. Hrudková; J. Irwin; S. R. Kane; F. P. Keenan; T. A. Lister; P. Maxted; M. Mayor; C. Moutou; A. J. Norton; J. P. Osborne; N. Parley; F. Pont; D. Queloz; R. Ryans; E. Simpson
• Keywords: Radial velocity; Hot Jupiter; Giant planet; Gas giant

We report the discovery of WASP-3b, third transiting exoplanet to be discovered by WASP and SOPHIE collaboration. WASP-3b transits its host star USNO-B1.0 1256−0285133 every 1.846 834 ± 0.000 002 d. Our high-precision radial velocity measurements present a variation with amplitude characteristic planetary-mass companion in phase light curve. Adaptive optics imaging shows no evidence for nearby stellar companions, line-bisector analysis excludes faint, unresolved binarity activity as cause variations. make preliminary spectroscopic find it have Teff= 6400 100 K log g= 4.25 0.05 which suggests is most likely an unevolved main-sequence spectral type F7-8V. simultaneous modelling transit photometry reflex motion leads us derive mass 1.76+0.08−0.14MJ radius 1.31+0.07−0.14RJ WASP-3b. The proximity relative temperature that one hottest exoplanets known, thus has potential place stringent constraints on atmospheric models.