* Astronomy

Title: WASP-64b and WASP-72b: two new transiting highly irradiated giant planets
Authors: M. Gillon, D. R. Anderson, A. Collier-Cameron, A. P. Doyle, A. Fumel, C. Hellier, E. Jehin, M. Lendl, P. F. L. Maxted, J. Montalban, F. Pepe, D. Pollacco, D. Queloz, D. Segransan, A. M. S. Smith, B. Smalley, J. Southworth, A. H. M. J. Triaud, S. Udry, R. G. West

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 Jupiter masses) and larger (1.271±0.039 Jupiter radii) than Jupiter, and is in very-short (a=0.02648±0.00024 AU) circular orbit around a V=12.3 G7-type dwarf (1.004±0.028 solar masses, 1.058±0.025 solar radii, Teff=5500±150 K). Its size is typical of hot Jupiters with similar masses. WASP-72b has also a mass a bit larger than Jupiter's (1.410-0.050+0.045 Jupiter masses) and orbits very close (0.03655-0.00032+0.00039 AU) to a slightly evolved V=9.6 F7-type star (1.327-0.035+0.043 solar masses, 1.71-0.09+0.16 solar radii, Teff=6250±100 K). Despite its extreme irradiation (about 4 10^9 erg/s/cm²), WASP-72b has a size consistent with Jupiter's (1.01-0.08+0.12 Jupiter radii) that makes it a possible outlier among the hot Jupiters of similar masses, suggesting a significant enrichment in heavy elements.

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