4 papers
A Progress Report on the Empirical Determination of the ZZ Ceti Instability Strip
A. Gianninas, P. Bergeron, G. Fontaine
Although the Sloan Digital Sky Survey has permitted the discovery of an increasing number of new ZZ Ceti stars, recent published analyses have shown that there are still many relat…
A Search for Unresolved Double Degenerates Using IUE Archives
Charles-Philippe Lajoie, Pierre Bergeron
We present preliminary results of a study aimed at detecting double white dwarf systems using a method based on a comparison of optical and UV spectra for 141 DA stars drawn from t…
Comparison of White Dwarf Mass Determinations
S. Boudreault, P. Bergeron
White dwarf masses can be determined in several ways. Here we compare masses obtained from Balmer line spectroscopy with those derived from trigonometric parallax measurements for…
Analysis of DA White Dwarfs from the McCook & Sion Catalog
A. Gianninas, P. Bergeron, P. Dufour
The Sloan Digital Sky Survey has already doubled the number of spectroscopically identified white dwarfs. However, there remains a wealth of white dwarfs in the McCook & Sion catal…