* Astronomy

Blobrana · L

RE: WASP-14b extrasolar planet

Blobrana · L

Title: WASP-14b: 7.3 Mj transiting planet in an eccentric orbit
Authors: Y. C. Joshi, D. Pollacco, A. Collier Cameron, I. Skillen, E. Simpson, I. Steele, R. A. Street, H. C. Stempels, D. J. Christian, L. Hebb, F. Bouchy, N. P. Gibson, G. Hebrard, F. P. Keenan, B. Loeillet, J. Meaburn, C. Moutou, B. Smalley, I. Todd, R. G. West, D. Anderson, S. Bentley, B. Enoch, C. A. Haswell, C. Hellier, K. Horne, J. Irwin, T. A. Lister, I. McDonald, P. Maxted, M. Mayor, A. J. Norton, N. Parley, C. Perrier, F. Pont, D. Queloz, R. Ryans, A. M. S. Smith, S. Udry, P. J. Wheatley, D. M. Wilson
(Version v2)

We report the discovery of a 7.3 Mjup exoplanet WASP-14b, one of the most massive transiting exoplanets observed to date. The planet orbits the tenth-magnitude F5V star USNO-B1 11118-0262485 with a period of 2.243752 days 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 Mjup and a radius of 1.28 ±0.08 Rjup. This leads to a mean density of about 4.6 g/cm³ making it densest transiting exoplanets yet found at an orbital period less than 3 days. 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/s² and vsin i = 4.9 ±1.0 km/s, 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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Blobrana · L

Title: WASP-14b: A 7.7 Mjup transiting exoplanet in an eccentric orbit
Authors: Y. C. Joshi, D. Pollacco, A. Collier Cameron, I. Skillen, E. Simpson, I. Steele, R. A. Street, H. C. Stempels, F. Bouchy, D. J. Christian, N. P. Gibson, L. Hebb, G. Hebrard, F. P. Keenan, B. Loeillet, J. Meaburn, C. Moutou, B. Smalley, I. Todd, R. G. West, D. Anderson, S. Bentley, B. Enoch, C. A. Haswell, C. Hellier, K. Horne, J. Irwin, T. A. Lister, I. McDonald, P. Maxted, M. Mayor, A. J. Norton, N. Parley, C. Perrier, F. Pont, D. Queloz, R. Ryans, A. M. S. Smith, S. Udry, P. J. Wheatley, D. M. Wilson

We report the discovery of a 7.7 Mjup exoplanet WASP-14b, one of the most massive transiting exoplanets observed to date. The planet orbits the tenth-magnitude F5V star USNO-B1 11118-0262485 with a period of 2.243756 days and orbital eccentricity e = 0.095. A simultaneous fit of the transit light curve and radial velocity measurements yields a planetary mass of 7.7(+0.4)(-0.7) Mjup and a radius of 1.26(+0.08)(-0.06) Rjup. This leads to a mean density of about 5.1 gcm^{-3} making it one of the densest transiting exoplanets yet found at an orbital period less than 3 days. 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 = 4.33 cms^{-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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