White dwarf stars are the final evolutionary stage of the vast majority of stars, including our
Sun. Since the coolest white dwarfs are very old objects, the present population of white …

Galactic history is written in the white dwarf stars. Their surface properties hint at interiors
composed of matter under extreme conditions. In the forty years since their discovery …

Context. The number of detected extremely low-mass (ELM) white dwarf stars has increased
drastically in recent years, thanks to the results of many surveys. In addition, some of these …

ZZ Ceti stars form the most numerous group of degenerate variable stars. They are
otherwise normal DA (H-rich atmospheres) white dwarfs that exhibit pulsations. Here, we …

We employ a state-of-the-art asteroseismological model of G117− B15A, the archetype of
the H-rich atmosphere (DA) white dwarf pulsators (also known as DAV or ZZ Ceti variables) …

We analyze the stability of g-modes in white dwarfs with hydrogen envelopes. All relevant
physical processes take place in the outer layer of hydrogen-rich material, which consists of …

The white dwarfs are promising laboratories for the study of cosmochronology and stellar
evolution. Through observations of the pulsating white dwarfs, we can measure their internal …

We present a study of the hypothesis that white dwarfs undergo a spectral change from
hydrogen-to helium-dominated atmospheres using a volume-limited photometric sample …

Pulsating white dwarfs with hydrogen-rich atmospheres, also known as DAV stars, can be
used as astrophysical laboratories to constrain the properties of fundamental particles like …

We present the observed pulsation spectra of all known noninteracting ZZ Ceti stars
(hydrogen atmosphere white dwarf variables [DAVs]) and examine changes in their …