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The changing phases of extrasolar planet CoRoT-1b

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  • Ignas A. G. Snellen

    (Leiden Observatory, Leiden University, Postbus 9513, 2300 RA Leiden, The Netherlands)

  • Ernst J. W. de Mooij

    (Leiden Observatory, Leiden University, Postbus 9513, 2300 RA Leiden, The Netherlands)

  • Simon Albrecht

    (Leiden Observatory, Leiden University, Postbus 9513, 2300 RA Leiden, The Netherlands)

Abstract

Exoplanetary phases seen It's nearly 400 years since Galileo first observed the changing phases of Venus, revealing the geometry of the Solar System. Now the first optical observations of the phases of an extrasolar planet — the hot Jupiter CoRoT-1b — are reported. CoRoT-1b was the first planet discovered by the CoRoT (COnvection ROtation and planetary Transits) satellite, and analysis of optical photometric data from the same satellite, representing 36 planetary orbits, now shows the permanent nightside hemisphere of the planet to be entirely black. The dayside flux, reflecting a small proportion of the incident stellar light, dominates the optical phase curve. This means that at optical wavelengths the planet's phase variation resembles what we see for the interior planets in the Solar System.

Suggested Citation

  • Ignas A. G. Snellen & Ernst J. W. de Mooij & Simon Albrecht, 2009. "The changing phases of extrasolar planet CoRoT-1b," Nature, Nature, vol. 459(7246), pages 543-545, May.
    • Handle: RePEc:nat:nature:v:459:y:2009:i:7246:d:10.1038_nature08045
    DOI: 10.1038/nature08045
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