Results 1 to 10 of about 130 (117)
Asteroseismology of hot B subdwarf stars [PDF]
EPJ Web of Conferences, 2013 Non-radial pulsations in Extreme Horizontal Branch stars (also known as hot B subdwarfs or sdB stars) offer strong opportunities to study, through asteroseismology, the structure and internal dynamics of stars in this intermediate stage of stellar ...
Fontaine G. +5 more
doaj +3 more sources
Population synthesis of Galactic subdwarf B stars [PDF]
Astrophysics and Space Science, 2010 Appeared in 2010 in Ap& ...
Gijs Nelemans, Nelemans G
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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
exaly +2 more sources
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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Tidal Spin-up of Subdwarf B Stars
The Astrophysical JournalHot subdwarf B (sdB) stars are stripped helium-burning stars that are often found in close binaries, where they experience strong tidal interactions. The dissipation of tidally excited gravity waves alters their rotational evolution throughout the sdB ...
Linhao Ma, Jim Fuller
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Hot subdwarf stars in close-up view [PDF]
Astronomy and Astrophysics, 2013 Context: Hot subdwarf B stars (sdBs) are considered to be core helium-burning stars with very thin hydrogen envelopes situated on or near the extreme horizontal branch (EHB). The formation of sdBs is still unclear as well as the chemical composition of their atmospheres. The observed helium depletion is attributed to atmospheric diffusion.
exaly +3 more sources
Detection of pulsations in three subdwarf B stars [PDF]
Astronomy and Astrophysics, 2001 We report the detection of short period oscillations in the sdB stars HS 0815+4243, HS 2149+0847 and HS 2201+2610 from time-series photometry made at the Nordic Optical Telescope (NOT) from a sample of 31 candidates. Hence these three hot subdwarfs are new members of the EC 14026 class of pulsating sdB stars.
Ulrich Heber +2 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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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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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, CM +4 more
openaire +5 more sources