The growth of asphericity in cosmology

Details The growth of asphericity in cosmology The growth of asphericity in cosmology

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...126..403s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 126, no. 2, Oct. 1983, p. 403-406.

Astronomy and Astrophysics

Astrophysics

1

Asphericity, Cosmology, Galactic Clusters, Galactic Evolution, Anisotropy, Distribution Functions, Numerical Integration, Velocity Distribution

Scientific paper

The growth of asphericity in the case of a nonrotating, triaxial ellipsoid undergoing violent relaxation in an Einstein-de-Sitter background is examined. Numerical integration of the differential equations for the three semiaxes show that each axis initially expands, but then recollapses and bounces back and forth indefinitely. Violent relaxation damps these oscillations. For strongly bound structures, the final equilibrium configurations owe their asphericity to the assumed anisotropy in the velocity distribution function. For mildly bound structures, highly flattened or elongated configurations are found which are still evolving on cosmological time scales.

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