WASP-3b: a strongly irradiated transiting gas-giant planet
WASP Consortium (Including: Pollacco, Don and Wheatley, Peter J.). (2008) WASP-3b: a strongly irradiated transiting gas-giant planet. Monthly Notices of the Royal Astronomical Society, Vol.385 (No.3). pp. 1576-1584. ISSN 0035-8711Full text not available from this repository.
Official URL: http://dx.doi.org/10.1111/j.1365-2966.2008.12939.x
We report the discovery of WASP-3b, the third transiting exoplanet to be discovered by the 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 of a planetary-mass companion and in phase with the light curve. Adaptive optics imaging shows no evidence for nearby stellar companions, and line-bisector analysis excludes faint, unresolved binarity and stellar activity as the cause of the radial velocity variations. We make a preliminary spectroscopic analysis of the host star and find it to have T-eff = 6400 +/- 100 K and log g = 4.25 +/- 0.05 which suggests it is most likely an unevolved main-sequence star of spectral type F7-8V. Our simultaneous modelling of the transit photometry and reflex motion of the host leads us to derive a mass of 1.76(-0.14)(+0.08) M-J and radius 1.31(-0.14)(+0.07) R-J for WASP-3b. The proximity and relative temperature of the host star suggests that WASP-3b is one of the hottest exoplanets known, and thus has the potential to place stringent constraints on exoplanet atmospheric models.
|Item Type:||Journal Article|
|Subjects:||Q Science > QB Astronomy|
|Divisions:||Faculty of Science > Physics|
|Library of Congress Subject Headings (LCSH):||Extrasolar planets, Astronomical photometry|
|Journal or Publication Title:||Monthly Notices of the Royal Astronomical Society|
|Official Date:||11 April 2008|
|Number of Pages:||9|
|Page Range:||pp. 1576-1584|
|Access rights to Published version:||Restricted or Subscription Access|
Anderson D. et al., 2008, MNRAS, submitted
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