Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 726, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/726/2/L19
Keywords
binaries: eclipsing; brown dwarfs; stars: individual (WASP-30)
Categories
Funding
- UK's Science and Technology Facilities Council
- Belgian Science Policy Office
- STFC [ST/J000078/1, ST/G002355/1, ST/J000035/1, PP/F000073/1, ST/I002308/1, PP/D000955/1, PP/F000065/1, PP/F000057/1, ST/I001719/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/G002355/1, ST/J000035/1, ST/I001719/1, PP/F000073/1, PP/D000955/1, ST/J000078/1, PP/F000057/1, PP/F000065/1, ST/I002308/1] Funding Source: researchfish
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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.
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