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Three-Body Problem and Multiple Stellar Systems

Published online by Cambridge University Press:  22 February 2018

M. Valtonen
M. Valtonen*
Affiliation:
Tuorla Observatory, Piikkiö, Finland

Abstract

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Three-body processes go on in star clusters where binary stars meet single stars and frequently form temporary triple systems. The triples are typically unstable and break up into a new binary and a single star. Also a simple scattering of a single star from a binary may take place. Both processes can be handled by the statistical theories of three-body break-up and scattering. Here we apply the theory to binary stars, assuming that binaries have been involved in the three-body process. The distributions of binary periods, eccentricities and mass ratios are discussed from this point of view and compared with observational samples.

Resumen

Resumen

Las interacciones de tres cuerpos ocurren en cúmulos estelares, donde se dan encuentros entre binarias y estrellas sencillas formando temporalmente sistemas triples. Las triples son generalemente inestables y se fragmentan en una nueva binaria y una estrella sencilla. La simple dispersión de una estrella sencilla por una binaria también ocurre. Ambos procesos pueden ser estudiados con la teoría estadística del rompimiento y la dispersión de tres cuerpos. En este trabajo, aplicamos la teoría a las estrellas binarias, suponiendo que éstas han participado en procesos de tres cuerpos. Se discuten las distribuciones de los períodos, las excentricidades y los cocientes de masa de las binarias obtenidos, y se comparan con muestras observacionales.

Keywords

BinariesGeneral
Type
Theoretical Approaches to Multiple Stars and Their Formation
Information
International Astronomical Union Colloquium , Volume 191: The Environment and Evolution of Double and Multiple Stars , August 2004 , pp. 146 - 151
Copyright
Copyright © Instituto de Astronomia – Mexico 2004

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