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New Pulsating DB White Dwarf Stars from the Sloan Digital Sky Survey
A. Nitta, S. J. Kleinman, J. Krzesinski +8
We are searching for new He atmosphere white dwarf pulsators (DBVs) based on the newly found white dwarf stars from the spectra obtained by the Sloan Digital Sky Survey. DBVs pulsa…
Pulsating White Dwarf Stars and Precision Asteroseismology
D. E. Winget, S. O. Kepler
Galactic history is written in the white dwarf stars. Their surface properties hint at interiors composed of matter under extreme conditions. In the forty years since their discove…
SDSS J142625.71+575218.3, a Prototype for a New Class of Variable White Dwarf
M. H. Montgomery, Kurtis A. Williams, D. E. Winget +3
We present the results of a search for pulsations in six of the recently discovered carbon-atmosphere white dwarf ("hot DQ") stars. Based on our theoretical calculations, the star…
Whole Earth Telescope observations of the hot helium atmosphere pulsating white dwarf EC 20058-5234
WET Collaboration, D. J. Sullivan, T. S. Metcalfe +22
We present the analysis of a total of 177h of high-quality optical time-series photometry of the helium atmosphere pulsating white dwarf (DBV) EC 20058-5234. The bulk of the observ…
Limits on Planets Around White Dwarf Stars
F. Mullally, D. E. Winget, Steven Degennaro +3
We present limits on planetary companions to pulsating white dwarf stars. A subset of these stars exhibit extreme stability in the period and phase of some of their pulsation modes…