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Statistical Investigation of Spectroscopic Binary Stars

Published online by Cambridge University Press:  14 August 2015

A. V. Tutukov  and
L. R. Yungelson
A. V. Tutukov
Affiliation:
Astronomical Council, USSR Academy of Sciences Mowcos, USSR
L. R. Yungelson
Affiliation:
Astronomical Council, USSR Academy of Sciences Mowcos, USSR

Abstract

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A catalog of physical parameters of about 1000 spectroscopic binary stars (SB), based on the Batten catalog, its extensions, and newly published data has been compiled. Masses of stars′ components (M1 and M2), mass ratios of components (q = M1/M2) and orbital angular momenta are computed, wherever possible. It is probable that the initial mass function of the primaries is non-monotonic and is described only approximately by a power-law. The distribution of q of double-line SB has a sharp maximum near q = 1, that of single-line SB, near q = 0.3. SB with 1.5 ≲ M1/M⊙ ≲ 10 and semiaxes of orbits a ≲ 10 R⊙ probably do not form. A number of assumed “initial” distributions of M1, q and a were transformed with the aim of obtaining “observed” distributions taking into account the observational selection due to the luminosities of the components, their radial velocities, inclinations of the orbits, and the effects of matter exchange between the components. The best agreement with the observations is obtained for the combination of a power-law initial mass function ξ(M) ≃ M−2.35, a distribution of q with a maximum near 1 and a distribution of semiaxes with dN/da ≃ 1/a.

Type
I. General Reviews and Surveys
Information
Symposium - International Astronomical Union , Volume 88: Close Binary Stars: Observations and Interpretation , 1980 , pp. 15 - 22
Copyright
Copyright © Reidel 1980 

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