Results 11 to 20 of about 91 (85)
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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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
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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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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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New Subdwarf B Star Periods [PDF]
, 2003 4 pages, 2 figures. Uses CRCKAPB.sty. To appear in the Proceedings of the XIII European Workshop on White Dwarfs. NATO Science Series II, Kluwer Academic Publishers.
Morales-Rueda, L. +3 more
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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 evolution. Most sdB stars directly descend from former red giants and are expected to evolve straight into
Charpinet, Stéphane +5 more
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The origin of subdwarf B stars - II [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 We have carried out a detailed binary population synthesis (BPS) study of the formation of subdwarf B (sdB) stars and related objects (sdO, sdOB stars) using the latest version of the BPS code developed by Han and co-workers. We systematically investigate the importance of the five main evolutionary channels in which the sdB stars form after one or two
Han, Z +3 more
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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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Physical parameters for subdwarf B stars with composite spectra [PDF]
Astronomy & Astrophysics, 2002 For many years, the evolutionary origins of subdwarf B stars remained a mystery. Observations of sdB stars with composite spectra and theoretical considerations suggested that binary star evolution should play a major role, but proof that a large fraction are binaries has taken a decade to establish.
R. Aznar Cuadrado, C. S. Jeffery
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Mass-loss predictions for Subdwarf B stars [PDF]
Astrophysics and Space Science, 2004 8 pages, 1 figure, to appear in "Extreme Horizontal Branch Stars and Related Objects", Astrophysics and Space Science, Kluwer, ed.
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