WASP-14b: 7.3 MJ transiting planet in an eccentric orbit

Joshi, Y. C.; Pollacco, D.; Cameron, A. Collier; Skillen,, I.; Simpson, E.; Steele, I; Street, R. A; Stempels, H. C.; Christian, D. J.; Hebb, L.; Bouchy, F.; Gibson, N. P.; Hébrard, G.; Keenan, F. P.; Loeillet, B.;; Meaburn, J.; Moutou, C.; Smalley, B.; Todd, I.; West, R. G.; Anderson, D. R.; Bentley, S; Enoch, B.; Haswell, C. A.; Hellier, C.; Horne, K.; Irwin, J.; Liste, T. A; McDonald, I.; Maxted, P.; Mayor, M.; Norton, A. J.; Parley, N.; Perrier, C.; Pont, F.; Queloz, D.; Ryans, R.; Smith, A. M. S.; Udry, S.; Wheatley, P. J. and Wilson, D. M. (2009). WASP-14b: 7.3 MJ transiting planet in an eccentric orbit. Monthly Notices of the Royal Astronomical Society, 392(4) pp. 1532–1538.

DOI: https://doi.org/10.1111/j.1365-2966.2008.14178.x


We report the discovery of a 7.3 MJ 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 MJ and a radius of 1.28 ± 0.08 RJ. 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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