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WASP-24 b: a new transiting close-in hot Jupiter orbiting a late F-star

Street, R. A.; Simpson, E.; Barros, S. C. C.; Pollacco, D.; Joshi, Y.; Todd, I.; Collier Cameron, A.; Enoch, B.; Parley, N.; Stempels, E.; Hebb, L.; Triaud, A. H. M. J.; Queloz, D.; Segransan, D.; Pepe, F.; Udry, S.; Lister, T. A.; Depagne, É.; West, R. G.; Norton, A. J.; Smalley, B.; Hellier, C.; Anderson, D. R.; Maxted, P. F. L.; Bentley, S. J.; Skillen, I.; Gillon, M.; Wheatley, P.; Bento, J.; Cathaway-Kjontvedt, P. and Christian, D. J. (2010). WASP-24 b: a new transiting close-in hot Jupiter orbiting a late F-star. The Astrophysical Journal, 720(1) p. 337.

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We report the discovery of a new transiting close-in giant planet, WASP-24 b, in a 2.341 day orbit, 0.037 AU from its F8-9 type host star. By matching the star's spectrum with theoretical models, we infer an effective temperature T eff = 6075 ± 100 K and a surface gravity of log g = 4.15 ± 0.10. A comparison of these parameters with theoretical isochrones and evolutionary mass tracks places only weak constraints on the age of the host star, which we estimate to be 3.8+1.3 –1.2 Gyr. The planetary nature of the companion was confirmed by radial velocity measurements and additional photometric observations. These data were fit simultaneously in order to determine the most probable parameter set for the system, from which we infer a planetary mass of 1.071+0.036 –0.038 M Jup and radius 1.3+0.039 –0.037 R Jup.

Item Type: Journal Item
Copyright Holders: 2010 The American Astronomical Society
ISSN: 1538-4357
Keywords: planetary systems
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 23629
Depositing User: Andrew Norton
Date Deposited: 02 Nov 2010 10:26
Last Modified: 07 Dec 2018 09:41
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