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WASP-37b : A 1.8 M J exoplanet transiting a metal-poor star

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Simpson, E. K., Faedi, F., Barros, S. C. C., Brown, D. J. A., Cameron, A. Collier, Hebb, L., Pollacco, Don, Smalley, B., Todd, I., Butters, O. W. et al.
(2011) WASP-37b : A 1.8 M J exoplanet transiting a metal-poor star. Astronomical Journal, Vol.141 (No.1). Article no.8. doi:10.1088/0004-6256/141/1/8

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Abstract

We report on the discovery of WASP-37b, a transiting hot Jupiter orbiting an m(v) = 12.7 G2-type dwarf, with a period of 3.577469 +/- 0.000011 d, transit epoch T-0 = 2455338.6188 +/- 0.0006 (HJD; dates throughout the paper are given in Coordinated Universal Time (UTC)), and a transit duration 0.1304(-0.0017)(+0.0018) d. The planetary companion has a mass M-p = 1.80 +/- 0.17 M-J and radius R-p = 1.16(-0.06)(+0.07) R-J, yielding a mean density of 1.15(-0.15)(+0.12) rho(J). From a spectral analysis, we find that the host star has M-star = 0.925 +/- 0.120 M-circle dot, R-star = 1.003 +/- 0.053 R-circle dot, T-eff = 5800 +/- 150 K, and [Fe/H] = -0.40 +/- 0.12. WASP-37 is therefore one of the lowest metallicity stars to host a transiting planet.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Science > Physics
Journal or Publication Title: Astronomical Journal
Publisher: Institute of Physics Publishing Ltd.
ISSN: 0004-6256
Official Date: January 2011
Dates:
DateEvent
January 2011Published
Volume: Vol.141
Number: No.1
Number of Pages: 7
Page Range: Article no.8
DOI: 10.1088/0004-6256/141/1/8
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: UK's Science and Technology Facilities Council, William Penny Fellowship, European Community
Grant number: RG226604 (EC)

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