Periodic stars in the HeI that also showed a periodicity in the CoRoT light curves. Bidimensional periodograms of the HeI line (first and third columns). The color code represents the power of the periodogram, varying from zero (white) to the maximum power intensity (black). The black horizontal lines correspond to the period of the 2011 CoRoT light curve. The second and fourth columns present the HeI lines used to calculate the periodograms. Different colors correspond to different nights of observation, and the thick red line is the average line profile.