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 …

Extremely low-mass white dwarfs (ELM WDs) are helium WDs with a mass less than∼ 0.3
M⊙. Most ELM WDs are found in double degenerates (DDs) in the ELM Survey led by …

Extremely low-mass white dwarf stars (ELMs) are M< 0.3 M⊙ helium-core white dwarfs born
either as a result of a common-envelope phase or after a stable Roche lobe overflow …

Double degenerate (DD) systems are supposed to be significant gravitational-wave (GW)
sources for future space-based GW detectors, eg, the Laser Interferometer Space Antenna …

Abstract SDSS J111215. 82+ 111745.0 is the second pulsating extremely low-mass white
dwarf discovered. Two short-period pulsations, 107.56 and 134.275 s, were detected on this …

Context. The advent of high-quality space-based photometry, brought about by missions
such as Kepler/K2 and TESS, makes it possible to unveil the fundamental parameters and …

We present an asteroseismological analysis of four ZZ Ceti stars observed with the Kepler
spacecraft: GD 1212, SDSS J113655. 17+ 040952.6, KIC 11911480, and KIC 4552982 …

Context. Asteroseismology is a powerful tool used to infer the evolutionary status and
chemical stratification of white dwarf stars and to gain insights into the physical processes …

Context. The nature of the recently identified “sdA” spectroscopic class of stars is not well
understood. The thousands of known sdAs have H-dominated spectra, spectroscopic …

Context. An increasing number of low-mass (M⋆/M⊙≲ 0.45) and extremely low-mass (ELM,
M⋆/M⊙≲ 0.18− 0.20) white-dwarf stars are being discovered in the field of the Milky Way …