期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 392, 期 4, 页码 1532-1538出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2008.14178.x
关键词
techniques: photometric; techniques: radial velocities; stars: individual: GSC 01482-00882
资金
- Queen's University Belfast
- Open University, Isaac Newton Group La Palma and Instituto de Astrof 'isica de Canarias. SuperWASP Cameras
- Consortium Universities
- UK's Science and Technology Facilities Council
- SOPHIE
- Optical Infrared Coordination Network
- Science and Technology Facilities Council [PP/F000065/1, ST/F002599/1, ST/G009465/1, PP/F000057/1, PP/D000963/1, ST/G001987/1, PP/F000081/1, PP/D000955/1, ST/G002355/1, PP/D000890/1, ST/G002533/1, PP/E001149/1] Funding Source: researchfish
- STFC [PP/D000963/1, PP/F000081/1, ST/G001987/1, ST/J000035/1, PP/D000890/1, ST/G002533/1, ST/G002355/1, PP/E001149/1, ST/F002599/1, ST/G009465/1, PP/D000955/1, PP/F000065/1, PP/F000057/1] Funding Source: UKRI
We report the discovery of a 7.3 M-J exoplanet WASP-14b, one of the most massive transiting exoplanets observed to date. The planet orbits the 10th-magnitude F5V star USNO-B1 11118-0262485 with a period of 2.243 752 d and orbital eccentricity e = 0.09. A simultaneous fit of the transit light curve and radial velocity measurements yields a planetary mass of 7.3 +/- 0.5 M-J and a radius of 1.28 +/- 0.08 R-J. This leads to a mean density of about 4.6 g cm(-3) making it the densest transiting exoplanets yet found at an orbital period less than 3 d. We estimate this system to be at a distance of 160 +/- 20 pc. Spectral analysis of the host star reveals a temperature of 6475 +/- 100 K, log g = 4.07 cm s(-2) and v sin i = 4.9 +/- 1.0 km s(-1), and also a high lithium abundance, log N(Li) = 2.84 +/- 0.05. The stellar density, effective temperature and rotation rate suggest an age for the system of about 0.5-1.0 Gyr.
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