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Rapid heating of the atmosphere of an extrasolar planet

Author

Listed:
  • Gregory Laughlin

    (UCO/Lick Observatory, University of California, Santa Cruz, California 95064, USA)

  • Drake Deming

    (NASA/Goddard Space Flight Center, Planetary Systems Branch, Code 693, Greenbelt, Maryland 20771, USA)

  • Jonathan Langton

    (UCO/Lick Observatory, University of California, Santa Cruz, California 95064, USA)

  • Daniel Kasen

    (UCO/Lick Observatory, University of California, Santa Cruz, California 95064, USA)

  • Steve Vogt

    (UCO/Lick Observatory, University of California, Santa Cruz, California 95064, USA)

  • Paul Butler

    (Carnegie Institute of Washington, 5241 Broad Branch Road, NW, Washington DC 20015, USA)

  • Eugenio Rivera

    (UCO/Lick Observatory, University of California, Santa Cruz, California 95064, USA)

  • Stefano Meschiari

    (UCO/Lick Observatory, University of California, Santa Cruz, California 95064, USA)

Abstract

How hot a Jupiter? The weather on HD 80606b Many 'hot Jupiter' extrasolar planets are known. Their properties vary, but virtually all are thought to be spin-synchronized, so that the same hemisphere faces the parent star at all times. HD 80606b breaks that mould. It is a hot Jupiter with an extremely eccentric orbit and is not spin-synchronized. This makes it a tempting target for observation: the planet experiences a near-1,000-fold increase in heating at periastron, its closest brush with the host star. Observations at periastron using the Spitzer Space Telescope provide a first glimpse of time-varying 'weather' on an extrasolar planet. Its 8-µm (near-infrared) brightness temperature rose from 800 to 1,500 K in six hours. The detection of a secondary eclipse helped fix the planetary mass at about four times that of Jupiter.

Suggested Citation

  • Gregory Laughlin & Drake Deming & Jonathan Langton & Daniel Kasen & Steve Vogt & Paul Butler & Eugenio Rivera & Stefano Meschiari, 2009. "Rapid heating of the atmosphere of an extrasolar planet," Nature, Nature, vol. 457(7229), pages 562-564, January.
    • Handle: RePEc:nat:nature:v:457:y:2009:i:7229:d:10.1038_nature07649
    DOI: 10.1038/nature07649
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