Astrophysics - Solar and Stellar Astrophysics; Astrophysics - Earth and Planetary Astrophysics
Abstract :
[en] We report the discovery of a 61-Jupiter-mass brown dwarf (BD), which transits its F8V host star, WASP-30, every 4.16 days. From a range of age indicators we estimate the system age to be 1-2 Gyr. We derive a radius (0.89 ± 0.02 R Jup) for the companion that is consistent with that predicted (0.914 R Jup) by a model of a 1 Gyr old, non-irradiated BD with a dusty atmosphere. The location of WASP-30b in the minimum of the mass-radius relation is consistent with the quantitative prediction of Chabrier & Baraffe, thus confirming the theory.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Anderson, D. R.
Collier Cameron, A.
Hellier, C.
Lendl, M.
Maxted, P. F. L.
Pollacco, D.
Queloz, D.
Smalley, B.
Smith, A. M. S.
Todd, I.
Triaud, A H M J
West, R. G.
Barros, S. C. C.
Enoch, B.
Gillon, Michaël ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
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