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- Title
WASP-64 b and WASP-72 b: two new transiting highly irradiated giant planets.
- Authors
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.; Pepe, F.; Pollacco, D.; Queloz, D.; Ségransan, D.; Smith, A. M. S.; Smalley, B.; Southworth, J.; Triaud, A. H. M. J.; Udry, S.; West, R. G.
- 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+0.059-0.056 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 x 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.
- Subjects
IRRADIATION; SOLAR radiation; JUPITER (Planet); PLANETARY orbits; STARS
- Publication
Astronomy & Astrophysics / Astronomie et Astrophysique, 2013, Vol 552, Issue 1, p1
- ISSN
0004-6361
- Publication type
Article
- DOI
10.1051/0004-6361/201220561