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On Dynamical Non-Stationarity of the Galaxy Systems

Published online by Cambridge University Press:  12 April 2016

J.P. Anosova ,
L.G. Kiseleva  and
V.V. Orlov
J.P. Anosova
Affiliation:
Astronomical Observatory, St. Petersburg University, Russia
L.G. Kiseleva
Affiliation:
Dept. of Applied Mathematics, Herzen Pedagogical Institute, St. Petersburg, Russia

Abstract

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By the computer simulations we have studied a behaviour of the virial coefficient k(t) for the triples and quintets of galaxies as a function of time. In a number of cases some quasiperiodical oscillations k(t) have been observed; these variations are resulted from an existence of the temporary binary subsystems. Strong negative correlation between k and rmin (rmin is a minimum separation between the bodies) is observed. A presence of a large hidden mass Mn distributed around a triple increases the degree of stochasticity of the process k(t) and decreases the correlation between k and rmin. The process k(t) must not been considered as a random one, as the autocorrelation function does not show any decreasing of the oscillation amplitude with a grow of time.

Type
Part III Stellar Systems and Galaxies
Information
International Astronomical Union Colloquium , Volume 132: Instability, Chaos and Predictability in Celestial Mechanics and Stellar Dynamics , 1993 , pp. 161 - 169
Copyright
Copyright © Nova Science Publishers 1993

References

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