  To date, the CoRoT space mission has produced more than 124,471 light curves.
Classifying these curves in terms of unambiguous variability behavior is
mandatory for obtaining an unbiased statistical view on their controlling
root-causes. The present study provides an overview of semi-sinusoidal light
curves observed by the CoRoT exo-field CCDs. We selected a sample of 4,206
light curves presenting well-defined semi-sinusoidal signatures. The
variability periods were computed based on Lomb-Scargle periodograms, harmonic
fits, and visual inspection. Color-period diagrams for the present sample show
the trend of an increase of the variability periods as long as the stars
evolve. This evolutionary behavior is also noticed when comparing the period
distribution in the Galactic center and anti-center directions. These aspects
indicate a compatibility with stellar rotation, although more information is
needed to confirm their root-causes. Considering this possibility, we
identified a subset of three Sun-like candidates by their photometric period.
Finally, the variability period versus color diagram behavior was found to be
highly dependent on the reddening correction.
