Results 21 to 30 of about 127 (114)
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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Orbital periods of 22 subdwarf B stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 Subdwarf B (sdB) stars are thought to be core helium burning stars with low mass hydrogen envelopes. In recent years it has become clear that many sdB stars lose their hydrogen through interaction with a binary companion and continue to reside in binary systems today.
L. Morales-Rueda +4 more
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Evidence of Resonant Mode Coupling in the Hot B Subdwarf Star KIC 10139564
EPJ Web of Conferences, 2015 The Kepler spacecraft provides new opportinuties to observe long term frequency and amplitude modulations of oscillation modes in pulsating stars. We analyzed more than three years of uninterrupted data obtained with this instrument on the hot B subdwarf
Zong W., Charpinet S., Vauclair G.
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Detection of pulsations in three subdwarf B stars [PDF]
Astronomy & 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.
R. Østensen +5 more
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HST spectroscopy of chemically peculiar hot subdwarfs: PG 0909+276 and UVO0512–08
Open Astronomy, 2017 High-resolution ultraviolet spectroscopy of two chemically peculiar hot subdwarfs, PG 0909+276 and UVO0512-08, has been obtained using the Hubble Space Telescope.
Wild James, Jeffery Christopher Simon
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Binary Hypothesis for the Subdwarf B Stars
The Astrophysical Journal, 1976 While observational evidence exists for the composite nature of some of the subdwarf B stars, the conservation of total mass and angular momentum produces a companion whose visual magnitude is similar to that of the subdwarf in the cases we consider.
John G. Mengel +2 more
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EPJ Web of Conferences, 2013 Precision asteroseismic observations with the Kepler and CoRot satellites enable the internal structure and evolution of pulsating stars to be more exhaustively studied than has hitherto been possible.
Lynas-Gray A.E.
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The OB-type subdwarf HD 149382 and the nature of the subdwarf B stars
The Astrophysical Journal, 1975 High-dispersion spectra and monochromatic continuum measures of the subdwarf OB star HD 149382 have been obtained and analyzed to yield the atmospheric parameters T)=40,000 K, log g=5.8. Helium is deficient by a factor 10 compared to Population I. Sulfur is the only element, other than hydrogen and helium, observed in the blue spectrum of this object ...
B. Baschek, J. Norris
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LS IV — 14°116 : A Time-Resolved Spectroscopic Study
Open Astronomy, 2017 LSIV-14 116 is a very unusual subdwarf B star. It pulsates non-radially with high-order g-modes, these pulsations are unexpected and unexplained, as the effective temperature is 6 000K hotter than the blue edge of the hot subdwarf g-mode instability ...
Martin Pamela, Jeffery C. Simon
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Asteroseismic Analysis of Pulsating Subdwarf B Stars [PDF]
International Astronomical Union Colloquium, 2002 AbstractWe briefly present a method to perform detailed asteroseismological analyses of pulsating subdwarf B (sdB) stars (also referred to as the EC14026 stars). We use a forward approach based on the computation of large grids of sdB stellar models (each model being analyzed with a linear nonadiabatic pulsation code) to derive, in an objective way ...
S. Charpinet, G. Fontaine, P. Brassard
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