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.
@article{arxiv.1010.3006,
title = {WASP-30b: a 61 Mjup brown dwarf transiting a V=12, F8 star},
author = {D. R. Anderson and A. Collier Cameron and C. Hellier and M. Lendl and P. F. L. Maxted and D. Pollacco and D. Queloz and B. Smalley and A. M. S. Smith and I. Todd and A. H. M. J. Triaud and R. G. West and S. C. C. Barros and B. Enoch and M. Gillon and T. A. Lister and F. Pepe and D. Ségransan and R. A. Street and S. Udry},
journal= {arXiv preprint arXiv:1010.3006},
year = {2015}
}
Comments
As accepted for publication in ApJL (6 pages, 2 figures, 3 tables)