Results 11 to 20 of about 3,864 (175)
Radial velocity measurements of Subdwarf B stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 MNRAS accepted. 22 pages with 10 tables and 4 figures. Revised to correct the object name of the helium-rich sdB mentioned in the last paragraph of section 4 ...
Copperwheat, C. M. +4 more
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Hot subdwarf B stars with neutron star components [PDF]
Astronomy & Astrophysics, 2020 Context. Subdwarf B stars (sdBs) play a crucial role in stellar evolution, asteroseismology, and far-UV radiation of early-type galaxies, and have been intensively studied with observation and theory. It has theoretically been predicted that sdBs with neutron star (NS) companions exist in the Galaxy, but none have been discovered yet.
You Wu +4 more
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, 2018 Subdwarf B (sdB) stars are horizontal branch stars with thin hydrogen envelopes surrounding a half solar mass helium core. Following their classification in 1966 by Greenstein, little progress was made in understanding these apparently common stars. When pulsators were discovered by Kilkenny et al.
Michael David Reed
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The Scale Height of Blue Halo Subdwarf B Stars [PDF]
Symposium - International Astronomical Union, 1995 Numerous blue halo stars have been discovered during the past decade (e.g. the Palomar-Green Survey). Many are horizontal branch type, being HBA, HBB, sdB, or sdO star. The sdB stars (Teff between ≈ 18 000 and ≈ 30 000 K) are the endproducts of evolution in the red-giant phase.
K.S. De Boer +3 more
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Progress in the study of pulsating subdwarf B stars [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractDuring Kepler's main mission, nearly 20 pulsating subdwarf B (sdB: extreme horizontal branch stars) were discovered. Many of these stars were observed for three years, accumulating over 1.5 million observations. Only through these extended observations have we been able to identify pulsation modes, applying constraints for structure models ...
M. D. Reed
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Search for X-ray emission from subdwarf B stars with compact companion candidates [PDF]
, 2011 Stellar evolutionary models predict that most of the early type subdwarf stars in close binary systems have white dwarf companions. More massive companions, such as neutron stars or black holes, are also expected in some cases.
Campana, Sergio +4 more
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Subdwarf B Stars: Tracers Of Binary Evolution
, 2007 Subdwarf B stars are a superb stellar population to study binary evolution. In 2001, Maxted et al. (MNRAS, 326, 1391) found that 21 out of the 36 subdwarf B stars they studied were in short period binaries. These observations inspired new theoretical work that suggests that up to 90 per cent of subdwarf B stars are in binary systems with the remaining ...
Morales-Rueda, L. +2 more
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The Formation of Subdwarf B Stars [PDF]
International Astronomical Union Colloquium, 2002 AbstractWe performed full binary evolution calculations and carried out binary population synthesis studies in order to investigate the formation of subdwarf B (sdB) stars via the channels of stable Roche lobe overflow (RLOF), common envelope ejection and helium white dwarf mergers. Our model is successful in the explanation of observational properties
Han, Z +4 more
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Hot Subdwarf Stars Identified in LAMOST DR8 with Single-lined and Composite Spectra
The Astrophysical Journal, 2023 A total of 222 hot subdwarf stars were identified with LAMOST DR8 spectra, among which 131 stars show composite spectra and have been decomposed, while 91 stars present single-lined spectra.
Zhenxin Lei +8 more
doaj +1 more source
The origin of subdwarf B stars
Bulletin de la Société Royale des Sciences de Liège, 2023 The origin of subdwarf B stars (sdBs) is unclear. Different formation channels are proposed including: close-binary evolution, helium-mixing on the red giant branch and the hot flasher scenario. Circumstantial evidence exists that sdBs can result from single star evolution in high metallicity populations.
Ralf Napiwotzki, Callum Aubrey
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