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WASP-25b : a 0.6 MJ planet in the Southern hemisphere

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Enoch, B., Cameron, A. Collier, Anderson, D. R., Lister, T. A., Hellier, C., Maxted, P. F. L., Queloz, D., Smalley, B., Triaud, A. H. M. J., West, Richard G. et al.
(2010) WASP-25b : a 0.6 MJ planet in the Southern hemisphere. Monthly Notices of the Royal Astronomical Society, Volume 410 (Number 3). pp. 1631-1636. doi:10.1111/j.1365-2966.2010.17550.x ISSN 0035-8711.

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Official URL: http://dx.doi.org/10.1111/j.1365-2966.2010.17550.x

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Abstract

We report the detection of a 0.6 MJ extrasolar planet by WASP-South, WASP-25b, transiting its solar-type host star every 3.76 d. A simultaneous analysis of the WASP, FTS and Euler photometry and CORALIE spectroscopy yields a planet of Rp= 1.22 RJ and Mp= 0.58 MJ around a slightly metal-poor solar-type host star, [Fe/H]=− 0.05 ± 0.10, of R*= 0.92 R⊙ and M*= 1.00 M⊙. WASP-25b is found to have a density of ρp= 0.32 ρJ, a low value for a sub-Jupiter mass planet. We investigate the relationship of planetary radius to planetary equilibrium temperature and host star metallicity for transiting exoplanets with a similar mass to WASP-25b, finding that these two parameters explain the radii of most low-mass planets well.

Item Type: Journal Article
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title: Monthly Notices of the Royal Astronomical Society
Publisher: Wiley
ISSN: 0035-8711
Official Date: January 2010
Dates:
DateEvent
January 2010Published
Volume: Volume 410
Number: Number 3
Page Range: pp. 1631-1636
DOI: 10.1111/j.1365-2966.2010.17550.x
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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