The mass-ratio distribution of visual binary stars

The mass-ratio distribution of visual binary stars

The present effort to arrive a realistic statistical distribution of the mass-ratio q = M(secondary)/M(primary) investigates the selection effects governing the observations of visual binary stars on the basis of a numerical simulation code which 'generates' binary stars and 'looks�...

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Veröffentlicht in:Astrophysics and space science 1990-11, Vol.173 (2), p.315-342
1. Verfasser: HOGEVEEN, S. J
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Sprache:eng
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Astronomy
Binary and multiple stars
Earth, ocean, space
Exact sciences and technology
Multiple stars
Stars
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container_title Astrophysics and space science
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creator HOGEVEEN, S. J
description The present effort to arrive a realistic statistical distribution of the mass-ratio q = M(secondary)/M(primary) investigates the selection effects governing the observations of visual binary stars on the basis of a numerical simulation code which 'generates' binary stars and 'looks' at them to establish whether a terrestrial observer would be capable of detecting them. It is found that the mass-ratio distribution observed for main-sequence systems can be accounted for by a distribution of secondary masses according to the initial mass function (IMF), where phi(M) is proportional to M to the -2.7th power. Numerical simulations of biased sampling show that the q-distribution derived from the Orbits of Visual Binaries catalog is incompatible with the distribution of secondary masses according to the IMF. (O.C.)
doi_str_mv 10.1007/BF00643940
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source EZB-FREE-00999 freely available EZB journals; SpringerLink Journals - AutoHoldings
subjects Astronomy
Binary and multiple stars
Earth, ocean, space
Exact sciences and technology
Multiple stars
Stars
title The mass-ratio distribution of visual binary stars
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