Results 31 to 40 of about 91 (85)
Tidal Spin-up of Subdwarf B Stars
The Astrophysical JournalHot subdwarf B (sdB) stars 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 lifetime. While many sdB binaries have well-measured rotational and orbital frequencies, there have been few theoretical efforts to ...
Linhao 林昊 Ma 马, Jim Fuller
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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.
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Are there Two Populations of subdwarf B Stars Visible in Kinematic Samples? [PDF]
Symposium - International Astronomical Union, 1995 The discussions about stellar populations and their spatial distribution can be best advanced by studies of special and well defined star types. The study of subdwarf B stars provides great promise: it is relatively easy both to find sdB stars and to determine their physical parameters.
K. S. De Boer +7 more
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Resolving the pulsations of the subdwarf B star KPD 2109 + 4401 [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 8 pages, 4 figures, 5 tables; Accepted for publication in ...
Zhou, A.-Y. +10 more
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EXOTIME: searching for planets around pulsating subdwarf B stars [PDF]
Astrophysics and Space Science, 2010 Contribution to: The Fourth Meeting on Hot Subdwarf Stars and Related Objects, 20 - 24 July 2009, Shanghai, China, published 03/2010 by Ap&SS (Open access publication).
Schuh, Sonja +29 more
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Atmospheric parameters of field subdwarf B stars
The Astrophysical Journal, 1994 High signal-to-noise ratio optical spectrophotometry of a sample of field subluminous B stars drawn largely from the Palomar Green ultraviolet-excess survey is analyzed with a new grid of model atmospheres and synthetic spectra. The stellar effective temperatures, surface gravities, and photospheric helium abundances are determined simultaneously from ...
Rex A. Saffer +3 more
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Hot subdwarf stars in close-up view [PDF]
Astronomy & Astrophysics, 2012 Subluminous B stars (sdBs) form the extremely hot end of the horizontal branch and are therefore related to the blue horizontal branch (BHB) stars. While the rotational properties of BHB stars have been investigated extensively, studies of sdB stars have concentrated on close binaries that are influenced by tidal interactions between their components ...
Geier, S., Heber, U.
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The evolution of a hot subdwarf: observations of the pulsating subdwarf B star Feige~48
, 2003 Since pulsating subdwarf B (sdBV or EC14026) stars were first discovered (Kilkenny et al, 1997), observational efforts have tried to realize their potential for constraining the interior physics of extreme horizontal branch (EHB) stars. Difficulties encountered along the way include uncertain mode identifications and a lack of stable pulsation mode ...
Reed, M. D. +2 more
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Iron and nickel diffusion in subdwarf B stars
, 2011 6 pages, 5 figures, to appear in ASP Conference Series, the 61st Fujihara Seminar: Progress in solar/stellar physics with helio- and ...
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A comprehensive search for hot subdwarf stars using Gaia and TESS
Astronomy & AstrophysicsHot subdwarf B (sdB) stars are evolved, subluminous, helium-burning stars that most likely form when red giant stars loose their hydrogen envelope via interactions with close companions. They play an important role in our understanding of binary evolution, stellar atmospheres, and interiors.
Murat Uzundag +7 more
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