  This work brings a wavelet analysis for 14 Kepler white dwarf stars, in order
to confirm their photometric variability behavior and to search for
periodicities in these targets. From the observed Kepler light curves we
obtained the wavelet local and global power spectra. Through this procedure,
one can perform an analysis in time-frequency domain rich in details, and so to
obtain a new perspective on the time evolution of the periodicities present in
these stars. We identified a photometric variability behavior in ten white
dwarfs, corresponding to period variations of ~ 2 h to 18 days: among these
stars, three are new candidates and seven, earlier identified from other
studies, are confirmed.
