Results 51 to 60 of about 1,023 (124)
Astronomy & AstrophysicsContext. Hot subdwarf B (sdB) stars in close binaries with white dwarf (WD) companions are potential progenitors of double-detonation thermonuclear supernovae.
Hernandez Mercedes S. +3 more
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On the 3He anomaly in hot subdwarf B stars
Open Astronomy, 2017 Decades ago, 3He isotope enrichment in helium-weak B-type main-sequence, in blue horizontal branch and in hot subdwarf B (sdB) stars, i.e., helium-core burning stars of the extreme horizontal branch, were discovered. Diffusion processes in the atmosphere
Schneider David +4 more
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Stars on the ascending helium giant branch
Astronomy & AstrophysicsHot subdwarf stars with masses above 0.8 M⊙ ascend the helium giant branch after the end of core helium burning, before entering the white dwarf cooling track or exploding as type Ib/c supernovae.
Pritzkuleit M. +5 more
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Identifying hot subdwarf binaries with multimodal deep learning
Astronomy & AstrophysicsContext. Hot subdwarf stars are important tracers of stellar structure and evolution, while their binary systems provide key constraints on their formation channels. Nevertheless, the number of confirmed hot subdwarf binaries is still limited. Aims.
Li Qinqin +8 more
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Hot subdwarfs in close binaries observed from space I.
, 2022 Context: About a third of the hot subdwarfs of spectral type B (sdBs), which are mostly core-helium-burning objects on the extreme horizontal branch, are found in close binaries with cool, low-mass stellar, substellar, or white dwarf companions.
Schaffenroth, Veronika (Dr. habil.) +4 more
core +1 more source
He-star donor pathway for the hypervelocity star D6-2
Astronomy & AstrophysicsType Ia supernovae are thermonuclear explosions of white dwarfs, yet the nature of their progenitor systems remains uncertain. Recent discoveries of hypervelocity stars provide unique constraints, as these stars likely represent the surviving companions ...
Rajamuthukumar Abinaya Swaruba +4 more
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Odessa Astronomical Publications, 2011 The data about occurrence frequency of substars and white dwarfs among close stars are analyzed. The estimation of partial content of subdwarfs and stellar remains among populations II and III as function of power of initial mass function have been made.
В. А. Захожай +2 more
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Effective temperatures and luminosities of very hot o-type subdwarfs [PDF]
, 1982 Twelve very hot O-type subdwarfs were observed with the IUE-satellite in the low dispersion mode. Temperatures were derived from the slopes of the UV continua and distances were estimated from the color excesses.
Drilling, J. S., Schoenberner, D.
core
Multicomponent stellar wind from hot subdwarfs stars
, 2010 Stellar wind from hot subdwarf stars is mainly accelerated by the interaction of ultraviolet photospheric radiation with metals, mainly oxygen. Absorbing ions share momentum through Coulombic collisions with the remaining passive part of the plasma ...
Votruba, Viktor +7 more
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SUBDWARFS: ABUNDANCE OF LIGHT ELEMENTS
Odessa Astronomical Publications, 2017 CNO abundances in the atmospheres of seven metal-deficient stars were derived by model atmosphere method on the basis of high dispersion Echelle spectra obtained using the 6-m telescope of the Special Observatory of the Russian Academy of Sciences. The O
T. V. Mishenina +2 more
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