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A giant comet-like cloud of hydrogen escaping the warm Neptune-mass exoplanet GJ 436b

Author

Listed:
  • David Ehrenreich

    (Observatoire de l’Université de Genève)

  • Vincent Bourrier

    (Observatoire de l’Université de Genève)

  • Peter J. Wheatley

    (University of Warwick)

  • Alain Lecavelier des Etangs

    (CNRS, UMR 7095, Institut d’Astrophysique de Paris
    Sorbonnes Universités, UPMC Univ. Paris 6, UMR 7095, Institut d’Astrophysique de Paris)

  • Guillaume Hébrard

    (CNRS, UMR 7095, Institut d’Astrophysique de Paris
    Sorbonnes Universités, UPMC Univ. Paris 6, UMR 7095, Institut d’Astrophysique de Paris
    Observatoire de Haute-Provence, CNRS & OAMP)

  • Stéphane Udry

    (Observatoire de l’Université de Genève)

  • Xavier Bonfils

    (Univ. Grenoble Alpes, IPAG
    CNRS, IPAG)

  • Xavier Delfosse

    (Univ. Grenoble Alpes, IPAG
    CNRS, IPAG)

  • Jean-Michel Désert

    (CASA, University of Colorado, 389-UCB)

  • David K. Sing

    (Astrophysics Group, School of Physics, University of Exeter)

  • Alfred Vidal-Madjar

    (CNRS, UMR 7095, Institut d’Astrophysique de Paris
    Sorbonnes Universités, UPMC Univ. Paris 6, UMR 7095, Institut d’Astrophysique de Paris)

Abstract

In the ultraviolet spectrum, the Neptune-mass exoplanet GJ 436b is shown to have transit depths far greater than those seen in the optical spectrum, indicating that it is surrounded and trailed by a large cloud composed mainly of hydrogen atoms.

Suggested Citation

  • David Ehrenreich & Vincent Bourrier & Peter J. Wheatley & Alain Lecavelier des Etangs & Guillaume Hébrard & Stéphane Udry & Xavier Bonfils & Xavier Delfosse & Jean-Michel Désert & David K. Sing & Alfr, 2015. "A giant comet-like cloud of hydrogen escaping the warm Neptune-mass exoplanet GJ 436b," Nature, Nature, vol. 522(7557), pages 459-461, June.
    • Handle: RePEc:nat:nature:v:522:y:2015:i:7557:d:10.1038_nature14501
    DOI: 10.1038/nature14501
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