A wavelet analysis of photometric variability in Kepler white dwarf stars

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...

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Published inarXiv.org
Main Authors de Lira, S R, Bravo, J P, Leao, I C, da Costa, A D, Canto Martins, B L, de Freitas, D B, De Medeiros, J R
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 16.01.2019
Subjects
Photometry
Physics - Solar and Stellar Astrophysics
Power spectra
Stellar evolution
Wavelet analysis
White dwarf stars
White dwarfs
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1901.05384