167 citations · 238 across the 7 of their papers we have counts for
7 papers
The evolution of carbon-polluted white dwarfs at low effective temperatures
S. Blouin, P. Dufour
Taking advantage of the Gaia Data Release 2, recent studies have revisited the evolution of carbon-polluted white dwarfs (DQs) across a large range of effective temperatures. These…
On the Measurement of Fundamental Parameters of White Dwarfs in the Gaia Era
P. Bergeron, P. Dufour, G. Fontaine +5
We present a critical review of the determination of fundamental parameters of white dwarfs discovered by the Gaia mission. We first reinterpret color-magnitude and color-color dia…
Line Profiles of the Calcium I Resonance Line in Cool Metal-polluted White Dwarfs
S. Blouin, N. F. Allard, T. Leininger +2
Metal-polluted white dwarfs (DZ stars) are characterized by a helium-rich atmosphere contaminated by heavy elements traces originating from accreted rocky planetesimals. As a detai…
A New Generation of Cool White Dwarf Atmosphere Models. III. WD J2356209: Accretion of a Planetesimal with an Unusual Composition
S. Blouin, P. Dufour, N. F. Allard +3
WD J2356209 is a cool metal-polluted white dwarf whose visible spectrum is dominated by a strong and broad sodium feature. Although discovered nearly two decades ago, no detaile…
Infrared Opacities in Dense Atmospheres of Cool White Dwarf Stars
Piotr M. Kowalski, Simon Blouin, Patrick Dufour
Dense, He-rich atmospheres of cool white dwarfs represent a challenge to the modeling. This is because these atmospheres are constituted of a dense fluid in which strong multi-atom…
A New Generation of Cool White Dwarf Atmosphere Models Using Ab Initio Calculations
Simon Blouin, Patrick Dufour, Piotr M. Kowalski
Due to their high photospheric density, cool helium-rich white dwarfs (particularly DZ, DQpec and ultracool) are often poorly described by current atmosphere models. As part of our…