Substructure in clusters of galaxies - A clue to the 'missing' mass

Details Substructure in clusters of galaxies - A clue to the 'missing' mass Substructure in clusters of galaxies - A clue to the 'missing' mass

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ap%26ss..46..327w&link_type=abstract

Astrophysics and Space Science, vol. 46, Feb. 1977, p. 327-334. Research supported by the National Research Council of Canada an

Astronomy and Astrophysics

Astrophysics

9

Galactic Clusters, Gravitational Effects, Mass Distribution, Missing Mass (Astrophysics), Substructures, Virial Theorem, Binding, Galactic Evolution, Many Body Problem, Stellar Mass

Scientific paper

The influence of subclustering in rich clusters of galaxies is examined using results from numerical n-body experiments. It is found that, under some conditions, the standard virial theorem is satisfied. No physical missing mass is needed because its role is replaced by the gravitational energy of the subclustering. It is found that in the Coma cluster, this effect masquerades as a 'missing' mass about 7 times greater than the physical mass, so that the apparent extant virial discrepancy in this cluster is explained.

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