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J/AZh/79/738     Population model of binary stars in the Galaxy (Tutukov+, 2002)

A model for the population of binary stars in the Galaxy. Tutukov A.V., Yungelson L.R. <Astron. Zh. 79, 738 (2002)> =2002AZh....79..738T =2002ARep...46..667T
ADC_Keywords: Models, evolutionary ; Stars, double and multiple Abstract: A comparative study of the population of the galactic binary stars is performed for two modes of star formation: star formation at a constant rate over 10+10yrs, and a burst of star formation that reprocesses the same mass of gas into stars over 10+9yrs. Estimates are presented for the star formation rates and populations of about 100 types of binaries and the products of their evolution. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 71 82 Close binaries: formation rate, products of their evolution and counts in various models table4.dat 70 47 Wide binaries: formation rate, products of their evolution and counts in various models
Byte-by-byte Description of file: table1.dat table4.dat
Bytes Format Units Label Explanations
1- 5 A5 --- System Type of system (1) 7- 27 A21 --- SType Type of star or event (2) 29- 34 E6.2 yr-1 nuA Rate of binary formation in model A (3) 36- 41 E6.2 --- NA ? Number of close binaries for T=1010yrs in model A 43- 48 E6.2 yr-1 nuB ? Rate of binary formation in model B (4) 50- 55 E6.2 --- NB ? Number of close binaries for T=1010yrs in model B 57- 62 E6.2 yr-1 nuC ? Rate of binary formation in model C (5) 64- 70 E7.2 --- NC ? Number of close binaries for T=1010yrs in model C
Note (1): Type of binary system is designated as follows: MSS = Main-sequence stars SBH = Systems with black holes SNS = Systems with neutron stars SWD = Systems with white dwarfs SHS = Systems with helium stars SDS = Semi-detached systems CC = Coalescence of components CE = Common envelopes TZO = Thorne-Zytkov Objects CRO = Coalescence of relativistic objects SN = Supernovae IAHeL = Ignition of accreted He layer COND = Collapse of oxygen-neon dwarfs BH = Black holes NS = Neutron stars SGS = Subgiants, giants and supergiants HS = Helium stars WD = White dwarfs Note (2): Type of star or event is designated as follows: MS = main-sequence star BH = black hole XRS = X-ray source sd = semi-detached system SG = subgiant (a star with a helium core and hydrogen-burning layer) ONe = oxygen-neon-carbon white dwarf CO = carbon-oxygen white dwarf He = helium white dwarfs CO* = carbon-oxygen star R CrB*(CO) = R CrB star with detonating CO-core R CrB*(ONe) = R CrB star with collapsing ONe core HCE = system with a hydrogen common envelope HeCE = system with a helium common envelope TZ = Thorne-Zytkov objects G(He) = star in a stage of core He burning, AGB = star on the asymptotic giant branch Note (3): Model A: Continuus star formation over 10+10yrs with a constant rate. Common-envelope parameter, α=1 Blank entries correspond to cases when some type of system does not appear in the model at T=10 billion years Note (4): Model B: The star formation is as in a model A, but with α=0.5 Blank entries correspond to cases when some type of system does not appear in the model at T=10 billion years Note (5): Model C: The star formation occurs during the first 10+9yrs of the Galaxy's existence, at a constant rate, but exceeding one in the model A by the factor 10, and with α=1. Blank entries correspond to cases when some type of system does not appear in the model at T=10 billion years ------------------------------------------------------------------------------- Table2. Rate of formation of single black holes via different channels (yr-1). -------------------------------------------------------------------------------- Channels |Model_ | A B C -------------------------------------------------------------------------------- Disruption of binaries 1.3E-4 1.3E-4 0.0 Coalescence of black holes 1.2E-5 3.8E-5 8.8E-6 Coalescence of neutron stars and black holes 5.8E-5 7.8E-5 1.5E-5 Coalescence of neutron stars 1.5E-4 8.5E-5 3.9E-5 Evolution of the single products of coalescence 1.1E-5 2.0E-5 0.0 Coalescence of black holes with white dwarfs 2.9E-5 5.9E-5 6.3E-6 -------------------------------------------------------------------------------- Table3. Current rate of formation of single neutron stars in close binaries via the main channels (yr-1). -------------------------------------------------------------------------------- Channels |Model_ | A B C -------------------------------------------------------------------------------- Disruption of binaries 3.1E-3 2.4E-4 0.0 Evolution of the single products of coalescence 3.5E-3 5.4E-3 0.0 Coalescence of white dwarfs 9.0E-4 1.3E-4 3.7E-5 Core collapse of R CrB stars 5.3E-4 5.0E-4 0.0 Coalescence of neutron stars with white dwarfs 1.2E-3 7.5E-4 1.2E-4 Coalescence of neutron stars with MS stars 3.9E-4 9.8E-4 0.0

(End) Veta Avedisova (INASAN) 01-Oct-2002
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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