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Water vapour in the atmosphere of a transiting extrasolar planet

Author

Listed:
  • Giovanna Tinetti

    (European Space Agency, Frascati 00044, Italy
    University College London, Gower Street, London WC1E 6BT, UK
    Institut d’Astrophysique de Paris, CNRS, Université Pierre et Marie Curie, 75014 Paris, France)

  • Alfred Vidal-Madjar

    (Institut d’Astrophysique de Paris, CNRS, Université Pierre et Marie Curie, 75014 Paris, France)

  • Mao-Chang Liang

    (Division of Geological and Planetary Sciences,)

  • Jean-Philippe Beaulieu

    (Institut d’Astrophysique de Paris, CNRS, Université Pierre et Marie Curie, 75014 Paris, France)

  • Yuk Yung

    (Division of Geological and Planetary Sciences,)

  • Sean Carey

    (IPAC-Spitzer Science Center, California Institute of Technology, Pasadena, California 91125, USA)

  • Robert J. Barber

    (University College London, Gower Street, London WC1E 6BT, UK)

  • Jonathan Tennyson

    (University College London, Gower Street, London WC1E 6BT, UK)

  • Ignasi Ribas

    (Institut de Ciències de l’Espai (CSIC-IEEC), Campus UAB, 08193 Bellaterra, Spain)

  • Nicole Allard

    (Institut d’Astrophysique de Paris, CNRS, Université Pierre et Marie Curie, 75014 Paris, France)

  • Gilda E. Ballester

    (Lunar and Planetary Laboratory, University of Arizona, Tucson, 85721-0063, Arizona, USA)

  • David K. Sing

    (Institut d’Astrophysique de Paris, CNRS, Université Pierre et Marie Curie, 75014 Paris, France
    Centre National d’Etudes Spatiales, Paris 75001, France)

  • Franck Selsis

    (Ecole Normale Supérieure, CNRS, 69364 Lyon, France)

Abstract

A hint of water Over 200 planets have been detected orbiting stars other than the Sun. Many are 'hot Jupiters', giant extrasolar planets that orbit close in to their star, yet despite theorists predicting abundant water in the atmosphere of such planets, evidence for it has so far been equivocal. Now Tinetti et al. have obtained convincing evidence that one hot Jupiter at least does contain water vapour in its atmosphere. Planet HD 189733b was observed in the infrared as it passed in front of its parent star. The observed variations in apparent radius at different wavelengths are best explained as a result of absorption by water vapour.

Suggested Citation

  • Giovanna Tinetti & Alfred Vidal-Madjar & Mao-Chang Liang & Jean-Philippe Beaulieu & Yuk Yung & Sean Carey & Robert J. Barber & Jonathan Tennyson & Ignasi Ribas & Nicole Allard & Gilda E. Ballester & D, 2007. "Water vapour in the atmosphere of a transiting extrasolar planet," Nature, Nature, vol. 448(7150), pages 169-171, July.
    • Handle: RePEc:nat:nature:v:448:y:2007:i:7150:d:10.1038_nature06002
    DOI: 10.1038/nature06002
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