406 citations · 5.1k across the 112 of their papers we have counts for
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SDSS White Dwarf mass distribution at low effective temperatures
D. Koester, S. O. Kepler, S. J. Kleinman +1
The DA white dwarfs in the Sloan Digital Sky Survey, as analyzed in the papers for Data Releases 1 and 4, show an increase in surface gravity towards lower effective temperatures b…
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…
The temporal changes of the pulsational periods of the pre-white dwarf PG 1159-035
J. E. S. Costa, S. O. Kepler
PG 1159-035, a pre-white dwarf with T=140000 K, is the prototype of the PG1159 spectroscopic class and the DOV pulsating class. Changes in the star cause variations in its oscillat…
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…
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…
Evidence of thin helium envelopes in PG1159 stars
L. G. Althaus, A. H. Córsico, M. M. Miller Bertolami +2
We present evidence that PG1159 stars could harbour He--rich envelopes substantially thinner than those predicted by current evolutionary models with current estimates of mass loss…