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

R. A. Street, E. Simpson, S. C C Barros, D. Pollacco, Y. Joshi, I. Todd, A. Collier Cameron, B. Enoch, N. Parley, E. Stempels, L. Hebb, A. H M J Triaud, D. Queloz, D. Segransan, F. Pepe, S. Udry, T. A. Lister, É Depagne, R. G. West, A. J. NortonB. Smalley, C. Hellier, D. R. Anderson, P. F L Maxted, S. J. Bentley, I. Skillen, M. Gillon, P. Wheatley, J. Bento, P. Cathaway-Kjontvedt, D. J. Christian

    Research output: Contribution to journalArticlepeer-review

    33 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)337-343
    Number of pages7
    JournalAstrophysical Journal
    Volume720
    Issue number1
    DOIs
    Publication statusPublished - 1 Sept 2010

    Keywords

    • Planetary systems

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