Discovery of WASP-65b and WASP-75b

two hot Jupiters without highly inflated radii

Y. Gómez Maqueo Chew, F. Faedi, D. Pollacco, D. J. A. Brown, A. P. Doyle, A. Collier Cameron, M. Gillon, M. Lendl, B. Smalley, A. H M J Triaud, R. G. West, P. J. Wheatley, R. Busuttil, C. Liebig, D. R. Anderson, D. J. Armstrong, S. C C Barros, J. Bento, J. Bochinski, V. Burwitz & 21 others L. Delrez, B. Enoch, A. Fumel, C. A. Haswell, G. Hébrard, C. Hellier, S. Holmes, E. Jehin, U. Kolb, P. F L Maxted, J. McCormac, G. R M Miller, A. J. Norton, F. Pepe, D. Queloz, J. Rodríguez, D. Ségransan, I. Skillen, K. G. Stassun, S. Udry, C. Watson

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We report the discovery of two transiting hot Jupiters, WASP-65b (Mpl = 1.55 ± 0.16 MJ; Rpl = 1.11 ± 0.06 RJ), and WASP-75b (Mpl = 1.07 ± 0.05 MJ; Rpl = 1.27 ± 0.05 RJ). They orbit their host star every ?2.311, and ?2.484 days, respectively. The planet host WASP-65 is a G6 star (Teff = 5600 K, [Fe/H] = ?0.07 ± 0.07, age 8 Gyr); WASP-75 is an F9 star (Teff = 6100 K, [Fe/H] = 0.07 ± 0.09, age ? 3 Gyr).WASP-65b is one of the densest known exoplanets in the mass range 0.1 and 2.0 MJ (?pl = 1.13 ± 0.08 ?J), a mass range where a large fraction of planets are found to be inflated with respect to theoretical planet models. WASP-65b is one of only a handful of planets with masses of ?1.5 MJ, a mass regime surprisingly underrepresented among the currently known hot Jupiters. The radius of WASP-75b is slightly inflated (10%) as compared to theoretical planet models with no core, and has a density similar to that of Saturn (?pl = 0.52 ± 0.06 ?J).

Original languageEnglish
Article numberA36
Pages (from-to)1-11
Number of pages11
JournalAstronomy and Astrophysics
Volume559
DOIs
Publication statusPublished - 2013

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