Richness distribution of string-seeded Abell clusters - Accretion by a loop versus hierarchical clustering

Details Richness distribution of string-seeded Abell clusters - Accretion by a loop versus hierarchical clustering Richness distribution of string-seeded Abell clusters - Accretion by a loop versus hierarchical clustering

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...324...19z&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 324, Jan. 1, 1988, p. 19-34.

Astronomy and Astrophysics

Astrophysics

7

Astronomical Models, Dark Matter, Galactic Clusters, Galactic Evolution, Mass Distribution, String Theory, Big Bang Cosmology, Hierarchies, Loops, Universe, White Noise

Scientific paper

Heuristic derivations of the distribution of masses of virialized objects seeded by individual loops of cosmic string in various 'asymptotic' variants of the cosmic string scenario are presented. It is found that the cold dark matter model with loops sufficiently small to act as point masses and with 'inception times' roughly equal to t(eq) has the best chance of accounting for the observed richness distribution of Abell clsuters. The problem of accretion by a point mass is described and solved, and the resulting distribution of Abell cluster masses is derived. The richness distribution is compared with the prediction of hierarchical clustering scenarios, and the implications of the results for cosmic string scenarios and for calculations of cosmic string tension and Abell cluster density are discussed.

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