134 citations · 426 across the 10 of their papers we have counts for
11 papers
An evolutionary channel for CO-rich and pulsating He-rich subdwarfs
Marcelo M. Miller Bertolami, Tiara Battich, Alejandro H. Córsico +2
Recently a new class of hot subluminous stars strongly enriched in C and O have been discovered (CO-sdOs). These stars show abundances very similar to those observed in PG1159 star…
New simulations of accreting DA white dwarfs: inferring accretion rates from the surface contamination
F. C. Wachlin, G. Vauclair, S. Vauclair +1
A non negligible fraction of white dwarf stars show the presence of heavy elements in their atmospheres. The most accepted explanation for this contamination is the accretion of ma…
He white dwarfs with large H contamination: Convective mixing or accretion?
F. C. Wachlin, G. Vauclair, S. Vauclair
White dwarfs are compact objects with atmospheres containing mainly light elements, hydrogen or helium. Because of their surface high gravitational field, heavy elements diffuse do…
On the evolution of ultra-massive white dwarfs
María E. Camisassa, Leandro G. Althaus, Alejandro H. Córsico +6
Ultra-massive white dwarfs are powerful tools to study various physical processes in the Asymptotic Giant Branch (AGB), type Ia supernova explosions and the theory of crystallizati…
Pulsation properties of ultra-massive DA white dwarf stars with ONe cores
Francisco C. De Gerónimo, Alejandro H. Córsico, Leandro G. Althaus +2
Ultra-massive DA WD stars are expected to harbor ONe cores resulting from the progenitor evolution through the Super-AGB phase. As evolution proceeds during the WD cooling phase, a…
Evolutionary sequences for hydrogen-deficient white dwarfs
María E. Camisassa, Leandro G. Althaus, René D. Rohrmann +4
We present a set of full evolutionary sequences for white dwarfs with hydrogen-deficient atmospheres. We take into account the evolutionary history of the progenitor stars, all the…
Importance of fingering convection for accreting white dwarfs in the framework of full evolutionary calculations: the case of the hydrogen-rich white dwarfs GD133 and G29-38
F. C. Wachlin, G. Vauclair, S. Vauclair +1
A large fraction of white dwarf stars shows photospheric chemical composition polluted by heavy elements accreted from a debris disk. Such debris disks result from the tidal disrup…
Fingering Convection in Red Giants Revisited
F. C. Wachlin, S. Vauclair, L. G. Althaus
Fingering (thermohaline) convection has been invoked for several years as a possible extra-mixing which could occur in Red Giant stars due to the modification of the chemical compo…
Accretion from debris disks onto white dwarfs : Fingering (thermohaline) instability and derived accretion rates
M. Deal, S. Deheuvels, G. Vauclair +2
Recent observations of a large number of DA and DB white dwarfs show evidence of debris disks, which are the remnants of old planetary systems. The infrared excess detected with \e…
Thermohaline mixing and the photospheric composition of low-mass giant stars
F. C. Wachlin, M. M. Miller Bertolami, L. G. Althaus
We compute full evolutionary sequences of red giant branch stars close to the luminosity bump by including state of the art composition transport prescriptions for the thermohaline…
Regular and Chaotic Motion in Globular Clusters
D. D. Carpintero, J. C. Muzzio, F. C. Wachlin
As a first step towards a comprehensive investigation of stellar motions within globular clusters, we present here the results of a study of stellar orbits in a mildly triaxial glo…