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- Publications
- Influence
Spectroscopic Studies of DB White Dwarfs: The Instability Strip of the Pulsating DB (V777 Herculis) Stars
- A. Beauchamp, F. Wesemael, +4 authors P. Brassard
- Physics
- 10 May 1999
We have secured optical spectra for the eight currently known variable DB, or V777 Her, stars. With the help of a new generation of synthetic spectra, spectroscopic effective temperatures are derived… Expand
A compact system of small planets around a former red-giant star
- S. Charpinet, G. Fontaine, +8 authors J. Telting
- Physics, Medicine
- Nature
- 22 December 2011
Planets that orbit their parent star at less than about one astronomical unit (1 au is the Earth–Sun distance) are expected to be engulfed when the star becomes a red giant. Previous observations… Expand
The Pulsating White Dwarf Stars
- G. Fontaine, P. Brassard
- Physics
- 1 October 2008
We present a summary of what is currently known about the three distinct families of isolated pulsating white dwarfs. These are the GW Vir stars (He/C/O-atmosphere stars with Teff 120,000 K), the… Expand
COOLING SEQUENCES AND COLOR-MAGNITUDE DIAGRAMS FOR COOL WHITE DWARFS WITH HYDROGEN ATMOSPHERES
- G. Chabrier, P. Brassard, G. Fontaine, D. Saumon
- Physics
- 26 June 2000
We present new cooling sequences, color-magnitude diagrams, and color-color diagrams for cool white dwarfs with pure hydrogen atmospheres down to an effective temperature Teff = 1500 K. We include a… Expand
The Newly Discovered Pulsating Low-mass White Dwarfs: An Extension of the ZZ Ceti Instability Strip
- V. V. Grootel, G. Fontaine, P. Brassard, M. Dupret
- Physics
- 2013
In light of the exciting discovery of g-mode pulsations in extremely low-mass, He-core DA white dwarfs, we report on the results of a detailed stability survey aimed at explaining the existence of… Expand
Discovery and Asteroseismological Analysis of the Pulsating sdB Star PG 0014+067*
- P. Brassard, G. Fontaine, M. Billères, S. Charpinet, J. Liebert, R. Saffer
- Physics
- 20 December 2001
We report the discovery of low-amplitude, short-period, multiperiodic luminosity variations in the hot B subdwarf PG 0014+067. This star was selected as a potential target in the course of our… Expand
Adiabatic Survey of Subdwarf B Star Oscillations. III. Effects of Extreme Horizontal Branch Stellar Evolution on Pulsation Modes
- S. Charpinet, G. Fontaine, P. Brassard, B. Dorman
- Physics
- 1 June 2002
We present the final results of a large, systematic survey of the adiabatic oscillation properties of models of subdwarf B (sdB) stars. This survey is aimed at providing the minimal theoretical… Expand
Adiabatic properties of pulsating DA white dwarfs. II: Mode trapping in compositionally stratified models
- P. Brassard, G. Fontaine, F. Wesemael, C. Hansen
- Physics
- 1 May 1992
As part of a series of investigations aimed at understanding the adiabatic gravity-mode period structure of models of pulsating DA white dwarfs, we examine qualitatively and quantitatively the… Expand
Adiabatic properties of pulsating DA white dwarfs. IV - an extensive survey of the period structure of evolutionary models
- P. Brassard, G. Fontaine, F. Wesemael, M. Tassoul
- Physics
- 1 August 1992
The results of a detailed adiabatic survey of the pulsation properties of evolutionary models of pulsating DA white dwarfs are presented. Pulsation periods, kinetic energies, and first-order rotation… Expand
Binding site analysis using linear programming
- P. Brassard, J. Kramer, P. Collins
- Chemistry
- 1 February 1990
Estimation of binding site concentrations and equilibrium constants is achieved by using a linear programming techique configurated to a multiple-site monometal model