Signs of stochasticity in the dynamics of model triplets of galaxies

Details Signs of stochasticity in the dynamics of model triplets of galaxies Signs of stochasticity in the dynamics of model triplets of galaxies

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pazh...17..569i&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 17, July 1991, p. 569-574. In Russian.

Mathematics

Dynamical Systems

2

Astronomical Models, Dark Matter, Galactic Structure, Liapunov Functions, Stochastic Processes, Autocorrelation, Dynamical Systems, Galactic Evolution, Gravitational Fields

Scientific paper

The dynamical instability of an ensemble of model triplets of galaxies is investigated. The maximum Liapunov exponents and the characteristic fall times of autocorrelation functions for dynamical variables show that the time scale of the system's stochastization is considerably less than its lifetime. If dark matter is distributed in the volume of the system, it stimulates the system's dynamical instability and speeds up its stochastization.

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