期刊
ASTRONOMICAL JOURNAL
卷 137, 期 6, 页码 4834-4836出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-6256/137/6/4834
关键词
binaries: eclipsing; planetary systems; stars: individual (WASP-15); techniques: photometric; techniques: radial velocities; techniques: spectroscopic
资金
- STFC [PP/F000065/1, PP/F000057/1, ST/G002355/1, ST/F002599/1, PP/F000081/1, PP/D000890/1, ST/G001987/1, PP/D000955/1] Funding Source: UKRI
- Science and Technology Facilities Council [PP/F000065/1, PP/F000081/1, PP/D000890/1, PP/F000057/1, ST/F002599/1, PP/D000955/1, ST/G002355/1, ST/G001987/1] Funding Source: researchfish
We report the discovery of a low-density exoplanet transiting an 11th magnitude star in the Southern hemisphere. WASP-15b, which orbits its host star with a period P = 3.7520656 +/- 0.0000028 d, has a mass M(p) = 0.542 +/- 0.050 M(J) and radius R(p) = 1.428 +/- 0.077 R(J), and is therefore one of the least dense transiting exoplanets so far discovered (rho(p) = 0.247 +/- 0.035 g cm(-3)). An analysis of the spectrum of the host star shows it to be of spectral type around F5, with an effective temperature T(eff) 6300 +/- 100 K and [Fe/H] = -0.17 +/- 0.11.
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