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WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE
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. (2007) WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE. Monthly Notices of the Royal Astronomical Society, Vol.375 (No.3). pp. 951-957. ISSN 0035-8711 Full text not available from this repository.
Official URL: http://dx.doi.org/10.1111/j.1365-2966.2006.11350.x
Abstract
We have detected low-amplitude radial-velocity variations in two stars, USNO-B1.0 1219-0005465 (GSC 02265-00107 = WASP-1) and USNO-B1.0 0964-0543604 (GSC 00522-01199 = WASP-2). Both stars were identified as being likely host stars of transiting exoplanets in the 2004 SuperWASP wide-field transit survey. Using the newly commissioned radial-velocity spectrograph SOPHIE at the Observatoire de Haute-Provence, we found that both objects exhibit reflex orbital radial-velocity variations with amplitudes characteristic of planetary-mass companions and in-phase with the photometric orbits. Line-bisector studies rule out faint blended binaries as the cause of either the radial-velocity variations or the transits. We perform preliminary spectral analyses of the host stars, which together with their radial-velocity variations and fits to the transit light curves yield estimates of the planetary masses and radii. WASP-1b and WASP-2b have orbital periods of 2.52 and 2.15 d, respectively. Given mass estimates for their F7V and K1V primaries, we derive planet masses 0.80-0.98 and 0.81-0.95 times that of Jupiter, respectively. WASP-1b appears to have an inflated radius of at least 1.33 R-Jup, whereas WASP-2b has a radius in the range 0.65-1.26 R-Jup.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QB Astronomy |
| Divisions: | Faculty of Science > Physics |
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society |
| Publisher: | Wiley-Blackwell Publishing, Inc |
| ISSN: | 0035-8711 |
| Date: | 1 March 2007 |
| Volume: | Vol.375 |
| Number: | No.3 |
| Number of Pages: | 7 |
| Page Range: | pp. 951-957 |
| Identification Number: | 10.1111/j.1365-2966.2006.11350.x |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| URI: | http://wrap.warwick.ac.uk/id/eprint/32387 |
Data sourced from Thomson Reuters' Web of Knowledge
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