Constraints on possible long-term variability of ZZ Ceti stars
Journal Article
·
· Publ. Astron. Soc. Pac.; (United States)
- Harvard-Smithsonian Center for Astrophysics, Cambridge, Mass.
- Dominion Astrophysical Observatory, Victoria, British Columbia, Canada
Magnitude estimates for 15 ZZ Ceti (white-dwarf) variable stars determined from plates in the Harvard collection reveal no evidence for variability in excess of measurement errors (about 0.15m) since the 1890s. This suggests that these DA variables are not distinguished from their nonvariable counterparts of any large-amplitude, low-frequency, or secular variations.
- OSTI ID:
- 6807136
- Journal Information:
- Publ. Astron. Soc. Pac.; (United States), Vol. 92
- Country of Publication:
- United States
- Language:
- English
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