Testing the stationarity of white dwarf light-curves

Details Testing the stationarity of white dwarf light-curves Testing the stationarity of white dwarf light-curves

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jphcs.172a2080m&link_type=abstract

Journal of Physics: Conference Series, Volume 172, Issue 1, pp. 012080 (2009).

Physics

Scientific paper

Long period white dwarfs show changes in their frequency spectra from one observing season to another, i.e. their light-curves cannot be considered as stationary multiperiodic variations on long timescales. However, due to the complex frequency spectra of these stars and the narrow frequency spacing, it is still unknown, what the shortest time scale is, where real physical modulation exists. We present tests on artificial data, resembling the observations, using time-frequency distributions (TFDs), Fourier-analysis and the analytical signal method.

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