2012/10/31 by M. Gillon, D. R. Anderson, A. Collier Cameron +20 · 3 citations
Physics and Astronomy · #Astro and Planetary Science #Astrophysics and Star Formation Studies #Stellar, planetary, and galactic studies #astro-ph.EP
paper · pdf · doi:10.1051/0004-6361/201220561
Accepted for publication in Astronomy and Astrophysics. 12 pages, 13 figures. Version 2 presents new photometric data an updated parameters for the WASP-72 system
openalex publication_date 2013/02/11 · arxiv created 2013/02/25 · arxiv updated 2015/06/11 · openalex created_date 2020/11/23 · openalex updated_date 2026/08/01
We report the discovery by the WASP transit survey of two new highly irradiated giant planets transiting moderately bright stars. WASP-64b 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 MSun, 1.058+-0.025 RSun, Teff=5500+-150 K). Its size is typical of hot Jupiters with similar masses. WASP-72b 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 MSun, 1.98+-0.24 RSun, Teff=6250+-100 K). Despite its extreme irradiation (about 5.5 109 erg/s/cm2), WASP-72b 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.