ABSTRACT A medium-and high-resolution spectroscopic survey of helium-rich hot
subdwarfs is being carried out using the Southern African Large Telescope (SALT) …

Magnetic fields can play an important role in stellar evolution. Among white dwarfs, the most
common stellar remnant, the fraction of magnetic systems is more than 20 per cent. The …

Recently, a new class of hot subluminous stars strongly enriched in C and O has been
discovered (CO-sdOs). These stars show abundances very similar to those observed in …

Some surviving companions of Type Ia supernovae (SNe Ia) from the white dwarf+ main-
sequence (WD+ MS) channel may evolve to hot subdwarfs. In this paper, we perform stellar …

Hot subdwarf stars of spectral types O and B represent a poorly understood phase in the
evolution of low-mass stars, in particular of close compact binaries. A variety of phenomena …

Helium-burning hot subdwarf stars of spectral types O and B (sdO/B) are thought to be
produced through various types of binary interactions. The helium-rich hot subdwarf star EC …

We conducted an analysis of the abundances of He, C, and N in 210 He-rich hot subdwarfs
observed within both the Gaia Data Release 3 (DR3) and LAMOST DR7 data sets. This …

The Kepler spacecraft observed the hot subdwarf star PHL 417 during its extended K2
mission, and the high-precision photometric light curve reveals the presence of 17 pulsation …

ABSTRACT BPS CS 22940− 0009 is a helium-rich B-star that shares characteristics with
both helium-rich B subdwarfs and extreme helium stars. The optical spectrum of BPS CS …

Aims. The long-period sdOB+ G1V type spectroscopic binary SB 744 reveals strong lines of
fluorine and lead in the optical spectrum of the sdOB star and subsolar metallicity in the G1V …