WASP-24 b: A NEW TRANSITING CLOSE-IN HOT JUPITER ORBITING A LATE F-STAR

Journal Article · Wed Sep 01 00:00:00 EDT 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/720/1/337· OSTI ID:21460117

Street, R A; Lister, T A; Depagne, E ^[1]; Simpson, E; Barros, S C. C.; Pollacco, D; Joshi, Y; Todd, I ^[2]; Collier Cameron, A; Enoch, B; Parley, N ^[3]; Stempels, E ^[4]; Hebb, L ^[5]; Queloz, D; Segransan, D; Pepe, F; Udry, S ^[6]; West, R G ^[7]; Norton, A J ^[8]

---

1. Las Cumbres Observatory Global Telescope Network, 6740 Cortona Drive, Suite 102, Goleta, CA 93117 (United States)
2. Astrophysics Research Centre, Physics Building, Queen's University, Belfast, County Antrim, BT7 1NN (United Kingdom)
3. SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS (United Kingdom)
4. Department of Physics and Astronomy, P.O. Box 516, SE-751 20 Uppsala (Sweden)
5. Physics and Astronomy Department, Vanderbilt University, 1807 Station B, Nashville, TN 37235 (United States)
6. Observatoire Astronomique de l'Universite de Geneve, 51 Chemin des Maillettes, 1290 Sauverny (Switzerland)
7. Department of Physics and Astronomy, University of Leicester, University Road, Leicester, LE1 7RH (United Kingdom)
8. Department of Physics and Astronomy, The Open University, N2041, Venables Building, Milton Keynes, MK7 6AA (United Kingdom)

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{sub 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{sup +1.3}{sub -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{sup +0.036}{sub -0.038} M {sub Jup} and radius 1.3{sup +0.039}{sub -0.037} R{sub Jup}.

• OSTI ID: 21460117
• Journal Information: Astrophysical Journal, Vol. 720, Issue 1; Other Information: DOI: 10.1088/0004-637X/720/1/337; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
GRAVITATION
JUPITER PLANET
MASS
RADIAL VELOCITY
STARS
PLANETS
VELOCITY