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A recent analysis of high precision photometry obtained using the Keplerspacecraft has revealed two surprising discoveries: (1) over 860 main sequenceA-type stars -- approximately 40% of those identified in the Kepler field --exhibit periodic variability that may be attributable to rotational modulationby spots and (2) many of their light curves indicate the presence of amysterious and characteristic power spectral feature. We have been carrying outan ongoing analysis designed to expand upon these discoveries and to provide apossible explanation for the unusual power spectral features. In the following,we will put these recent discoveries into context as well as discuss thepreliminary findings yielded by our analysis of the Kepler light curves.

Deciphering the Surprising Variability of A-type Stars Revealed by Kepler