Wavelet analysis of pulsating white dwarfs.

摘要: Parts of light curves two variable white dwarfs, G191 16 and PG 1351+489, are investigated by means a wavelet analysis. This time-frequency analysis decomposes the into their different oscillating components whose temporal behaviors then individually studied. In addition to an oscillation large amplitude, small amplitude oscillations thereby clearly emphasized for both stars. Amplitude variations found most detected with periods modulation as long or greater than time intervals corresponding runs. A comparison star gives quality night in localizing perturbative atmospherical events