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Quiescent nuclear burning in low-metallicity white dwarfs
(IOP Publishing, 2013-09)
We discuss the impact of residual nuclear burning in the cooling sequences of hydrogen-rich (DA) white dwarfs with very low metallicity progenitors (Z = 0.0001). These cooling sequences are appropriate for the study of ...
The contribution of oxygen-neon white dwarfs to the MACHO content of the Galactic halo
(EDP Sciences, 2007-12)
Context. The interpretation of microlensing results towards the Large Magellanic Cloud (LMC) still remains controversial. White dwarfs have been proposed to explain these results and, hence, to contribute significantly to ...
Pulsations powered by hydrogen shell burning in white dwarfs
(EDP Sciences, 2016-10)
Context. In the absence of a third dredge-up episode during the asymptotic giant-branch phase, white dwarf models evolved from low-metallicity progenitors have a thick hydrogen envelope, which makes hydrogen shell burning ...
The effect of 22NE diffusion in the evolution and pulsational properties of white dwarfs with solar metallicity progenitors
(IOP Publishing, 2016-06)
Because of the large neutron excess of 22Ne, sedimentation of this isotope occurs rapidly in the interior of white dwarfs. This process releases an additional amount of energy, thus delaying the cooling times of the white ...
Forever young white dwarfs : when stellar ageing stops
(EDP Sciences, 2021-05)
White dwarf stars are the most common end point of stellar evolution. The ultramassive white dwarfs are of special interest as they are related to type Ia supernovae explosions, merger events, and fast radio bursts. ...
White dwarf evolutionary sequences for low-metallicity progenitors: The impact of third dredge-up
(EDP Sciences, 2015-04)
Context. White dwarfs are nowadays routinely used as reliable cosmochronometers, allowing several stellar populations to be dated. Aims. We present new white dwarf evolutionary sequences for low-metallicity progenitors. ...
White-dwarf asteroseismology with the kepler space telescope
(Frontiers Media, 2020-08-28)
In the course of their evolution, white-dwarf stars go through at least one phase of variability in which the global pulsations they undergo allow astronomers to peer into their interiors, making it possible to shed light ...
The formation of DA white dwarfs with thin hydrogen envelopes.
(EDP Sciences, 2005-12)
We study the formation and evolution of DA white dwarfs, the progenitors of which have experienced a late thermal pulse (LTP) shortly after the departure from the thermally pulsing AGB. To this end, we compute the complete ...