The active host star of the extrasolar planet COROT-EXO-2b

Details The active host star of the extrasolar planet COROT-EXO-2b The active host star of the extrasolar planet COROT-EXO-2b

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cxo..prop.2762s&link_type=abstract

Chandra proposal ID #11200214

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Scientific paper

We propose to perform an exploratory X-ray pointing at the host star of the extrasolar planet COROT-EXO-2b. In contrast to almost all other extrasolar planet host stars, this star is remarkably active and (presumably) quite young. Its COROT light curve shows clear signatures of rotational modulation, and there is very pronounced structure in the transit light curves, which is explained by partial coverage of star spots by the COROT-EXO-2b planet. The presence of the planet thus acts as a sensitive shutter, sensing different parts of the stellar surface for inhomogeneities. The aim of this proposal is to determine the X-ray flux level of COROT-EXO2a, in order to assess the potential of follow-up X-ray studies.

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