Testing the stationarity of white dwarf light-curves

L. Molnr, Z. Kollth, E. Plachy, M. Paparó

Research output: Article

Abstract

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.

Original languageEnglish
Article number012080
JournalJournal of Physics: Conference Series
Volume172
DOIs
Publication statusPublished - jan. 1 2009

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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