Wavelet analysis of pulsating white dwarfs

Details Wavelet analysis of pulsating white dwarfs Wavelet analysis of pulsating white dwarfs

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...250...89g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 250, no. 1, Oct. 1991, p. 89-98.

Statistics

Computation

17

Harmonic Analysis, Light Curve, Stellar Oscillations, Wave Equations, White Dwarf Stars, Astronomical Photometry, Computational Astrophysics, Data Processing

Scientific paper

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

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