WASP-64 b and WASP-72 b : two new transiting highly irradiated giant planets
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 M-Jup) and larger (1.271 +/- 0.039 R-Jup) 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-circle dot, 1.058 +/- 0.025 R-circle dot, T-eff = 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) M-Jup) 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-circle dot, 1.98 +/- 0.24 R-circle dot, T-eff = 6250 +/- 100 K). Despite its extreme irradiation (similar to 5.5 x 10(9) erg s(-1) cm(-2)), WASP-72 b has a moderate size (1.27 +/- 0.20 R-Jup) 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.
Citation
Gillon , M , Anderson , D R , Collier-Cameron , A , Doyle , A P , Fumel , A , Hellier , C , Jehin , E , Lendl , M , Maxted , P F L , Montalban , J , Pepe , F , Pollacco , D , Queloz , D , Segransan , D , Smith , A M S , Smalley , B , Southworth , J , Triaud , A H M J , Udry , S & West , R G 2013 , ' WASP-64 b and WASP-72 b : two new transiting highly irradiated giant planets ' , Astronomy & Astrophysics , vol. 552 , A82 . https://doi.org/10.1051/0004-6361/201220561
Publication
Astronomy & Astrophysics
Status
Peer reviewed
ISSN
0004-6361Type
Journal article
Rights
Copyright ESO 2013.
Collections
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.