Results 71 to 80 of about 805 (173)
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
doaj +1 more source
Odessa Astronomical Publications, 2011 The data about occurrence frequency of substars and white dwarfs among close stars are analyzed. The estimation of partial content of subdwarfs and stellar remains among populations II and III as function of power of initial mass function have been made.
В. А. Захожай +2 more
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Astronomy & AstrophysicsContext. Hot subdwarf B (sdB) stars in close binaries with white dwarf (WD) companions are potential progenitors of double-detonation thermonuclear supernovae.
Hernandez Mercedes S. +3 more
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SUBDWARFS: ABUNDANCE OF LIGHT ELEMENTS
Odessa Astronomical Publications, 2017 CNO abundances in the atmospheres of seven metal-deficient stars were derived by model atmosphere method on the basis of high dispersion Echelle spectra obtained using the 6-m telescope of the Special Observatory of the Russian Academy of Sciences. The O
T. V. Mishenina +2 more
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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
openaire +2 more sources
Analysis of F and G Subdwarfs. I. The Location of Subdwarfs in the Theoretical H-R Diagram [PDF]
, 1967 Spectrum scans and model stellar atmospheres have been used to locate in the (L/L_⊙, T_(eff)) plane F and G subdwarfs having known parallax A comparison is made between their position on the H-R diagram and the evolutionary tracks for Population II ...
Strom, S. E., Strom, K. M., Cohen, J. G.
core
Stars on the ascending helium giant branch
Astronomy & AstrophysicsHot subdwarf stars with masses above 0.8 M⊙ ascend the helium giant branch after the end of core helium burning, before entering the white dwarf cooling track or exploding as type Ib/c supernovae.
Pritzkuleit M. +5 more
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Nearby M subdwarfs from LAMOST data release 2
, 2016 International audienceWe identify 108 M subdwarfs (sdMs) out of more than two hundred thousand M type spectra from the second data release (DR2) of the LAMOST regular survey. This sample, among which 58 members are identified for the first time, includes
Du, Bing +24 more
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Searching for low-mass companions around white dwarfs and subdwarfs from Kepler field
, 2020 Knowing the late stages of the stellar evolution is crucial for understanding the fate of planets around subdwarfs and white dwarfs. Simulations by Staff et al.
Blokesz, Adam, Krzesiński, Jerzy
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, 2005 Author Institution: Department of Chemistry, University of Waterloo, Waterloo, Ont., Canada N2L 3G1; NASA Ames Research Center, Mailstop 230-3, Moffett Field, CA; 94035; National Solar Observatory, 950 N. Cherry Ave., P.O.
Milsom, J. A. +6 more
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