On the stochasticity of gravitational many-body systems in cosmology

Details On the stochasticity of gravitational many-body systems in cosmology On the stochasticity of gravitational many-body systems in cosmology

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasj...43l...9s&link_type=abstract

Astronomical Society of Japan, Publications (ISSN 0004-6264), vol. 43, no. 2, 1991, p. L9-L15.

Mathematics

Logic

11

Galactic Clusters, Gravitational Fields, Many Body Problem, Particle Motion, Stochastic Processes, Cosmology, Expansion, Particle Trajectories, Universe

Scientific paper

Nearby trajectories of particles in gravitational many-body systems are examined using cosmological N-body simulations. Specifically, Plummer's model was used with a softening radius, epsilon, to describe collisionless particle systems in an expanding universe. It is found that the comoving distance of the nearby trajectories increases exponentially with time as e exp lambda(t). This exponent quantitatively characterizes the stochasticity of the dynamics of gravitational many-body systems in cosmology.

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