463 citations · 5.5k across the 77 of their papers we have counts for
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Spectroscopic analysis of DA white dwarfs from the McCook & Sion catalog
A. Gianninas, P. Bergeron, M. T. Ruiz
For some years now, we have been gathering optical spectra of DA white dwarfs in an effort to study and define the empirical ZZ Ceti instability strip. However, we have recently ex…
The Solar Neighborhood. XX. Discovery and Characterization of 21 New Nearby White Dwarf Systems
John P. Subasavage, Todd J. Henry, P. Bergeron +2
We present medium resolution spectroscopy and multi-epoch VRI photometry for 21 new nearby (< 50 pc) white dwarf systems brighter than V ~ 17. Of the new systems, ten are DA (inclu…
The Ratio of Helium- to Hydrogen-Atmosphere White Dwarfs: Direct Evidence for Convective Mixing
P. -E. Tremblay, P. Bergeron
We determine the ratio of helium- to hydrogen-atmosphere white dwarf stars as a function of effective temperature from a model atmosphere analysis of the infrared photometric data…
On the Spectral Evolution of Cool, Helium-Atmosphere White Dwarfs: Detailed Spectroscopic and Photometric Analysis of DZ Stars
P. Dufour, P. Bergeron, James Liebert +6
We present a detailed analysis of a large spectroscopic and photometric sample of DZ white dwarfs based on our latest model atmosphere calculations. We revise the atmospheric param…
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…
Near-Infrared Photometric Analyses of White Dwarf Stars
P. -E. Tremblay, P. Bergeron
We review the available near- and mid- infrared photometry data sets for white dwarfs from the Two Micron All-Sky Survey (2MASS) Point Source Catalog and the Spitzer Space Telescop…