WASP-30b: a 61 Mjup brown dwarf transiting a V=12, F8 star
Anderson, D. R. · Cameron, A. Collier · 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, M. · Lister, T. A. · Pepe, F. · Ségransan, D. · Street, R. A. · Udry, S.
Original · EN
We report the discovery of a 61-Jupiter-mass brown dwarf, 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 RJup) for the companion that is consistent with that predicted (0.914 RJup) by a model of a 1-Gyr-old, non-irradiated brown dwarf 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 (2000), thus confirming the theory.
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