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Title:
Pregalactic evolution in cosmologies with cold dark matter
Authors:
Couchman, H. M. P.; Rees, M. J.
Affiliation:
AA(Cambridge University, England), AB(Cambridge University, England)
Publication:
Royal Astronomical Society, Monthly Notices (ISSN 0035-8711), vol. 221, July 1, 1986, p. 53-62. (MNRAS Homepage)
Publication Date:
07/1986
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
COLD PLASMAS, COSMOLOGY, GALACTIC EVOLUTION, GALACTIC STRUCTURE, MISSING MASS (ASTROPHYSICS), ROTATING MATTER, DENSITY DISTRIBUTION, MASS DISTRIBUTION, PHOTOIONIZATION, STAR CLUSTERS, STELLAR EVOLUTION, SUPERNOVAE, UNIVERSE
Bibliographic Code:
1986MNRAS.221...53C

Abstract

The authors discuss the possibility that the first objects forming in a universe dominated by cold dark matter might influence subsequent structure. They argue that the first objects would be stars forming in clusters of mass ≡105M_sun; which have condensed from the high-σ overdensity peaks in the initial fluctuation spectrum. Two simple mechanisms - photoionization and supernovae - may cause feedback effects which can significantly perturb the subsequent evolution from a simple hierarchical clustering progression. The authors discuss the possibility that effects arising from these initial small-scale clusters might influence regions on galactic scales and suggest tentative ideas which may give clues to the biasing of galaxy formation necessary in an Ω = 1 universe.

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