Debris Disks around COROT Target Stars

Details Debris Disks around COROT Target Stars Debris Disks around COROT Target Stars

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20065b&link_type=abstract

Spitzer Proposal ID #20065

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Within CoRoT's limited field of view we will search around the brightest stars for excess IR emission. Debris disks are potentially important for both science goals of the CoRoT mission, asteroseismology and exoplanet detection. For exoplanets, we have found that debris disks are correlated with the presence of giant planets; this correlation may well extend down to the telluric planets which CoRoT is hoping to locate. In has also been calculated that cometary tails may be detectable should they cross the face of their parent star. The influence of asteroidal and cometary debris on stellar structure via surface accretion is unclear, and can be addressed with CoRoT's seismological probing of the stellar interior. Overall, the detection of circumstellar material around these stars, in addition to furthering our knowledge of debris disks and their link to planetary systems, has great value in planning CoRoT observations and in interpreting its results. Our targets include 12 of the 14 candidate primary stars plus 1 additional star under consideration as a secondary CoRoT target. One primary star was excluded based on its estimated cirrus background. Another, the G0 star HD52265, we have already observed with Spitzer, resulting in the detection of circumstellar dust orbiting at tens of AU and clearly demonstrating the ability of MIPS to accurately measure IR excess within our sample of stars.

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