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WASP-64 b and WASP-72 b : two new transiting highly irradiated giant planets

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Gillon, M., Anderson, D. R., Collier-Cameron, A., Doyle, A. P., Fumel, A., Hellier, C., Jehin, E., Lendl, M., Maxted, P. F. L., Montalbán, J. et al.
(2013) WASP-64 b and WASP-72 b : two new transiting highly irradiated giant planets. Astronomy & Astrophysics, Volume 552 . Article number A82. doi:10.1051/0004-6361/201220561

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Official URL: http://dx.doi.org/10.1051/0004-6361/201220561

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Abstract

We report the discovery by the WASP transit survey of two new highly irradiated giant planets. WASP-64 b is slightly more massive (1.271 ± 0.068 MJup) and larger (1.271 ± 0.039 RJup) than Jupiter, and is in very-short (a = 0.02648 ± 0.00024 AU, P = 1.5732918 ± 0.0000015 days) circular orbit around a V = 12.3 G7-type dwarf (1.004 ± 0.028 M⊙, 1.058 ± 0.025 R⊙, Teff = 5500 ± 150 K). Its size is typical of hot Jupiters with similar masses. WASP-72 b has also a mass a bit higher than Jupiter’s (1.461-0.056+0.059 MJup) and orbits very close (0.03708 ± 0.00050 AU, P = 2.2167421 ± 0.0000081 days) to a bright (V = 9.6) and moderately evolved F7-type star (1.386 ± 0.055 M⊙, 1.98 ± 0.24 R⊙, Teff = 6250 ± 100 K). Despite its extreme irradiation (~5.5 × 109 erg s-1 cm-2), WASP-72 b has a moderate size (1.27 ± 0.20 RJup) that could suggest a significant enrichment in heavy elements. Nevertheless, the errors on its physical parameters are still too high to draw any strong inference on its internal structure or its possible peculiarity.

Item Type: Journal Article
Divisions: Faculty of Science > Physics
Journal or Publication Title: Astronomy & Astrophysics
Publisher: EDP Sciences
ISSN: 0004-6361
Official Date: 2013
Dates:
DateEvent
2013Published
Volume: Volume 552
Page Range: Article number A82
DOI: 10.1051/0004-6361/201220561
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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