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arXiv · 1010.3006

WASP-30b: a 61 Mjup brown dwarf transiting a V=12, F8 star

D. R. Anderson·A. Collier Cameron·C. Hellier·M. Lendl·P. F. L. Maxted·D. Pollacco·D. Queloz·B. Smalley·A. M. S. Smith·I. Todd·A. H. M. J. Triaud·R. G. West·S. C. C. Barros·B. Enoch·M. Gillon·T. A. Lister·F. Pepe·D. Ségransan·R. A. Street·S. Udry
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Abstract

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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D. R. Anderson, A. Collier Cameron, C. Hellier, M. Lendl, P. F. L. Maxted, D. Pollacco, D. Queloz, B. Smalley, A. M. S. Smith, I. Todd, A. H. M. J. Triaud, R. G. West, S. C. C. Barros, B. Enoch, M. Gillon, T. A. Lister, F. Pepe, D. Ségransan, R. A. Street, S. Udry. 2010-12-03. WASP-30b: a 61 Mjup brown dwarf transiting a V=12, F8 star. https://doi.org/10.1088/2041-8205%2F726%2F2%2Fl19

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