Overabundance of Short-Period Variables among Solar-type Stars?

Details Overabundance of Short-Period Variables among Solar-type Stars? Overabundance of Short-Period Variables among Solar-type Stars?

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21743452r&link_type=abstract

American Astronomical Society, AAS Meeting #217, #434.52; Bulletin of the American Astronomical Society, Vol. 43, 2011

Statistics

Scientific paper

The Kepler mission is designed to photometrically detect extrasolar planetary transits. In addition to providing opportunities for exoplanet detection, the light curves gathered by Kepler also contain unprecedented information on stellar variability. Many of the stars surveyed by the mission are solar mass or smaller and a potentially surprising fraction of these exhibit clear periodic behavior on timescales between 0.5-5 days. One interpretation is that more of these type G and cooler stars are rotating more rapidly than expected, which might imply more very young stars than expected. There are other potential explanations for the periodicity that could mimic rotation of young stars. Among these are close (sometimes eclipsing) binaries, harmonics of the rotation period, or stellar pulsation. We examine the statistics of the short period systems, and evaluate the sources of the short-period signals.

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