A simple kinetic model of a multi-particle cloud

Details A simple kinetic model of a multi-particle cloud A simple kinetic model of a multi-particle cloud

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983baicz..34..234h&link_type=abstract

Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 34, July 1983, p. 234-241.

Astronomy and Astrophysics

Astronomy

6

Astronomical Models, Clouds, Kinetic Theory, Particle Motion, Binary Stars, Gravitation, Particle Collisions, Ring Structures, Star Clusters

Scientific paper

A simple method for modelling the evolution of a cloud of particles is given. This method, based on the assumption of a Gaussian distribution function, enables the author to treat the shape, velocity gradient and the stress tensor of the cloud. Two analytical solutions are given as examples. The first one, corresponding to moving groups of stars, shows focusing by galactic potential. The second one, appropriate to viscous gaseous discs (for example around a binary component), leads to a different form of expansion (a thick ring or flat disc) and to oscillation frequencies within the limits of an optically thick or thin ring, respectively.

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