High-frequency stellar oscillations. XIII. Observations of apparently quiescent white dwarfs.
Abstract
Thirty-four time-series photometric observations of 17 spectroscopically confirmed white dwarfs observed during a search for new southern white-dwarf variables (ZZ Ceti stars) are summarized; all stars examined are apparently nonvariable on time scales of 4 5 to 2030 minutes. A list and a two-color diagram of white dwarfs and suspected white dwarfs examined for high-frequency variability in various surveys are also provided. It is pointed out that several sets of conflicting observations be indicative of variability on time scales for which observational data are largely lacking, i.e., greater than ∼30 minutes.
- Publication:
-
The Astrophysical Journal Supplement Series
- Pub Date:
- July 1979
- DOI:
- 10.1086/190598
- Bibcode:
- 1979ApJS...40..577H
- Keywords:
-
- Flare Stars;
- Ubv Spectra;
- Variable Stars;
- White Dwarf Stars;
- Astronomical Catalogs;
- High Frequencies;
- Stellar Luminosity;
- Astrophysics;
- Two-Color Diagrams:White Dwarfs;
- Variables:White Dwarfs;
- White Dwarfs:Surveys