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WASP-25b: a 0.6 MJ planet in the Southern hemisphere

Enoch, B. ; Cameron, A. Collier ; Anderson, D. R. ; Lister, T. A. ; Hellier, C. ; Maxted, P. F. L. ; Queloz, D. ; Smalley, B. ; Triaud, A. H. M. J. ; West, R. G. ; Brown, D. J. A. ; Gillon, M. ; Hebb, L. ; Lendl, M. ; Parley, N. ; Pepe, F. ; Pollacco, D. ; Segransan, D. ; Simpson, E. ; Street, R. A. ; Udry, S.

In: Monthly Notices of the Royal Astronomical Society, 2011, vol. 410, no. 3, p. 1631-1636

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    Titre
    • WASP-25b: a 0.6 MJ planet in the Southern hemisphere
    Auteur
    • Enoch, B.. School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS
    • Cameron, A. Collier. School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS
    • Anderson, D. R.. Astrophysics Group, Keele University, Staffordshire ST5 5BG
    • Lister, T. A.. Las Cumbres Observatory, 6740 Cortona Drive Suite 102, Goleta, CA 93117, USA
    • Hellier, C.. Astrophysics Group, Keele University, Staffordshire ST5 5BG
    • Maxted, P. F. L.. Astrophysics Group, Keele University, Staffordshire ST5 5BG
    • Queloz, D.. Observatoire astronomique de l'Universitén de Genéve, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
    • Smalley, B.. Astrophysics Group, Keele University, Staffordshire ST5 5BG
    • Triaud, A. H. M. J.. Observatoire astronomique de l'Universitén de Genéve, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
    • West, R. G.. Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH
    • Brown, D. J. A.. School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS
    • Gillon, M.. Observatoire astronomique de l'Universitén de Genéve, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
    • Hebb, L.. Vanderbilt University, Department of Physics and Astronomy, Nashville, TN 37235, USA
    • Lendl, M.. Observatoire astronomique de l'Universitén de Genéve, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
    • Parley, N.. School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS
    • Pepe, F.. Observatoire astronomique de l'Universitén de Genéve, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
    • Pollacco, D.. Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast BT7 1NN
    • Segransan, D.. Observatoire astronomique de l'Universitén de Genéve, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
    • Simpson, E.. Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast BT7 1NN
    • Street, R. A.. Las Cumbres Observatory, 6740 Cortona Drive Suite 102, Goleta, CA 93117, USA
    • Udry, S.. Observatoire astronomique de l'Universitén de Genéve, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Monthly Notices of the Royal Astronomical Society, 2011, vol. 410, no. 3, p. 1631-1636. Blackwell Publishing Ltd
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:292589
    Summary
    We report the detection of a 0.6 MJ extrasolar planet by WASP-South, WASP-25b, transiting its solar-type host star every 3.76 d. A simultaneous analysis of the WASP, FTS and Euler photometry and CORALIE spectroscopy yields a planet of Rp= 1.22 RJ and Mp= 0.58 MJ around a slightly metal-poor solar-type host star, [Fe/H]=− 0.05 ± 0.10, of R*= 0.92 R⊙ and M*= 1.00 M⊙. WASP-25b is found to have a density of ρp= 0.32 ρJ, a low value for a sub-Jupiter mass planet. We investigate the relationship of planetary radius to planetary equilibrium temperature and host star metallicity for transiting exoplanets with a similar mass to WASP-25b, finding that these two parameters explain the radii of most low-mass planets well