98 citations · 287 across the 5 of their papers we have counts for
9 papers · 1 filter
A Comparative Study of Optical and Ultraviolet Effective Temperatures for DA White Dwarfs from the IUE Archive
C. -P. Lajoie, P. Bergeron
We present a comparative study of effective temperatures determined from the hydrogen Balmer lines and from the UV energy distribution for 140 DA white dwarfs drawn from the IUE ar…
Evidence for a merger of binary white dwarfs: the case of GD 362
E. Garcia-Berro, P. Loren-Aguilar, A. G. Pedemonte +4
GD 362 is a massive white dwarf with a spectrum suggesting a H-rich atmosphere which also shows very high abundances of Ca, Mg, Fe and other metals. However, for pure H-atmospheres…
Mapping the ZZ Ceti Instability Strip: Discovery of 6 New Pulsators
A. Gianninas, P. Bergeron, G. Fontaine
As part of an ongoing program to map better the empirical instability strip of pulsating ZZ Ceti white dwarfs, we present a brief progress report based on our last observing season…
Towards an Empirical Determination of the ZZ Ceti Instability Strip
A. Gianninas, P. Bergeron, G. Fontaine
We present atmospheric parameters for a large sample of DA white dwarfs that are known to be photometrically constant. For each star, we determine the effective temperature and sur…
Detailed Spectroscopic and Photometric Analysis of DQ White Dwarfs
P. Dufour, P. Bergeron, G. Fontaine
We present an analysis of spectroscopic and photometric data for cool DQ white dwarfs based on improved model atmosphere calculations. In particular, we revise the atmospheric para…
Discovery of Spectroscopic Variations in the DAB White Dwarf GD 323
C. Pereira, P. Bergeron, F. Wesemael
We report the discovery of spectroscopic variations in GD 323, the prototypical DAB white dwarf. Simultaneous optical spectroscopic observations over five consecutive nights of GD…