Citation:
Mullally F, Thompson SE, Castanheira BG, Winget DE, Kepler SO, Eisenstein DJ, Kleinman SJ, Nitta A. Eleven New DA White Dwarf Variable Stars from the Sloan Digital Sky Survey. The Astrophysical Journal. 2005;625 :966-972.
Date Published:
June 1, 2005Abstract:
We report the discovery of 11 new variable DA white dwarf (ZZ Ceti)stars. Candidates were selected by deriving temperatures from model fitsto spectra obtained from the Sloan Digital Sky Survey (SDSS). We alsofind objects whose temperatures and gravities indicate they lie withinthe instability strip for pulsation but were not observed to vary.Although the temperatures are based on relatively low signal-to-noiseratio spectra, an impure strip is unexpected, which if confirmed, hasimplications for DA asteroseismology. This work brings the total numberof published variable DA white dwarf stars to 82.