Yearslong time series of high-precision brightness measurements have been assembled for
thousands of stars with telescopes operating in space. Such data have allowed astronomers …

Stars are extremely important astronomical objects that constitute the pillars on which the
Universe is built, and as such, their study has gained increasing interest over the years …

Hot subluminous stars of spectral type B and O are core helium-burning stars at the blue end
of the horizontal branch or have evolved even beyond that stage. Most hot subdwarf stars …

Based on data from the ESA Gaia Data Release 2 (DR2) and several ground-based, multi-
band photometry surveys we have compiled an all-sky catalogue of 39 800 hot subluminous …

This book surveys our understanding of stars which change in brightness because they
pulsate. Pulsating variable stars are keys to distance scales inside and beyond the Milky …

White-dwarf stars are the end product of stellar evolution for most stars in the Universe. Their
interiors bear the imprint of fundamental mechanisms that occur during stellar evolution …

Planets that orbit their parent star at less than about one astronomical unit (1 au is the Earth–
Sun distance) are expected to be engulfed when the star becomes a red giant. Previous …

We propose a methodological framework to perform forward asteroseismic modeling of stars
with a convective core, based on gravity-mode oscillations. These probe the near-core …

We present an update of our low-resolution spectroscopic follow-up and model atmosphere
analysis of hot subdwarf stars from the Galaxy Evolution Explorer (GALEX) survey. Targets …

The detection of mixed oscillation modes offers a unique insight into the internal structure of
core helium burning (CHeB) stars. The stellar structure during CHeB is very uncertain …