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Title:
Cooperative galaxy formation and large-scale structure
Authors:
Bower, Richard G.; Coles, Peter; Frenk, Carlos S.; White, Simon D. M.
Affiliation:
AA(Durham Univ., United Kingdom), AB(Queen Mary and Westfield College, London, United Kingdom), AC(Durham Univ., United Kingdom), AD(Steward Observatory, Tucson, AZ; Cambridge Univ. Inst. of Astronomy, United Kingdom)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 405, no. 2, p. 403-412. (ApJ Homepage)
Publication Date:
03/1993
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Cosmology, Dark Matter, Density (Mass/Volume), Galactic Clusters, Galactic Evolution, Mass Distribution, Luminosity, Mathematical Models
DOI:
10.1086/172372
Bibliographic Code:
1993ApJ...405..403B

Abstract

We consider a model in which galaxy formation occurs at high peaks of the mass density field, as in the standard picture for biased galaxy formation, but is further enhanced by the presence of nearby galaxies. This modification is accomplished by assuming the threshold for galaxy formation to be modulated by large-scale density fluctuations rather than to be spatially invariant. We show that even a weak modulation can produce significant large-scale clustering. In a universe dominated by cold dark matter, a 2 percent - 3 percent modulation on a scale exceeding 10/h Mpc produces enough additional clustering to fit the angular correlation function of the APM galaxy survey. We discuss several astrophysical mechanisms for which there are observational indications that cooperative effects could occur on the scale required.

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