Dark matter around a cluster of galaxies under the long cosmic string scheme

Details Dark matter around a cluster of galaxies under the long cosmic string scheme Dark matter around a cluster of galaxies under the long cosmic string scheme

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...428...51h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 428, no. 1, p. 51-60

Astronomy and Astrophysics

Astrophysics

7

Cosmology, Dark Matter, Galactic Clusters, Galactic Evolution, Group Velocity, Mass Distribution, Velocity Distribution, Hypersonic Wakes, Intersections, Mathematical Models

Scientific paper

We study the formation of cluster of galaxies induced by cosmic strings in a flat universe dominated by cold dark matter. A cluster of galaxies is considered to be formed at the crossing site of three wakes of infinitely long cosmic strings. In this scheme, we investigate the distribution of dark matter and galaxies within and around a cluster of galaxies. The simulated line-of-sight velocity dispersion and projected surface number density of galaxies are compared with the observations in a simplified case. Some features seem to be in good agreement with the observation, although the detailed structures require a more refined investigation. A characteristic pattern of density inhomogeneities is expected to exist within a cluster, which might be related to the substructures observed in many clusters of galaxies. The brightest cluster member, such as a gE, D, or cD galaxy, is naturally expected to reside at the cluster center in this scheme.

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