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 …

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 T eff≃ …

We review the observed properties of extremely hot, hydrogen‐deficient post–asymptotic
giant branch (AGB) stars of spectral type [WC] and PG1159. Their H deficiency is probably …

We explore the formation and evolution of hydrogen-deficient post-AGB white dwarfs. To this
end, we compute the complete evolution of an initially star from the zero-age main sequence …

A significant fraction of planetary nebulae (PNe) and protoplanetary nebulae (PPNe) exhibit
aspherical, axisymmetric structures, many of which are highly collimated. The origin of these …

The internal angular momentum distribution of a star is the key to determining its evolution.
Fortunately, stellar internal rotation can be probed through studies of rotationally split …

▪ Abstract Stars over essentially the whole mass domain can become pulsationally unstable
during various stages of their evolution. They will appear as variable stars with …

Probing internal properties of white-dwarf stars has been amongst the earliest objectives of
asteroseismology, following the first discovery in the late 1960s of non-radial pulsations in …

Context. The recent arrival of continuous photometric observations of unprecedented quality
from space missions has strongly promoted the study of pulsating stars and caused great …