High-speed Photometric Observations of ZZ Ceti White Dwarf Candidates
E. M. Green, M.-M. Limoges, A. Gianninas, P. Bergeron, G. Fontaine, P., Dufour, C. J. O'Malley, B. Guvenen, L. I. Biddle, K. Pearson, T. W. Deyoe, C., W. Bullivant, J. J. Hermes, V. Van Grootel, M. Grosjean
TL;DR
This study reports the discovery of six new ZZ Ceti pulsators and refines the instability strip for white dwarf stars through high-speed photometric observations of candidates from recent surveys.
Contribution
It introduces new ZZ Ceti pulsators and improves the understanding of the instability strip boundaries for white dwarf stars.
Findings
Six new ZZ Ceti pulsators identified
Refined the location of the ZZ Ceti instability strip
Several white dwarfs found to be photometrically constant
Abstract
We present high-speed photometric observations of ZZ Ceti white dwarf candidates drawn from the spectroscopic survey of bright DA stars from the Villanova White Dwarf Catalog by Gianninas et al., and from the recent spectroscopic survey of white dwarfs within 40 parsecs of the Sun by Limoges et al. We report the discovery of six new ZZ Ceti pulsators from these surveys, and several photometrically constant DA white dwarfs, which we then use to refine the location of the ZZ Ceti instability strip.
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Taxonomy
TopicsGamma-ray bursts and supernovae · Stellar, planetary, and galactic studies · Astronomy and Astrophysical Research