Pregalactic evolution in cosmologies with cold dark matter
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.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- July 1986
- DOI:
- 10.1093/mnras/221.1.53
- Bibcode:
- 1986MNRAS.221...53C
- Keywords:
-
- Cold Plasmas;
- Cosmology;
- Galactic Evolution;
- Galactic Structure;
- Missing Mass (Astrophysics);
- Rotating Matter;
- Density Distribution;
- Mass Distribution;
- Photoionization;
- Star Clusters;
- Stellar Evolution;
- Supernovae;
- Universe;
- Astrophysics