Abstract
Large-amplitude isothermal fluctuations in the dark-matter energy density, parametrized by Φ≡δ/, are studied within the framework of a spherical collapse model. For Φ≳1, a fluctuation collapses in the radiation-dominated epoch and produces a dense dark-matter object. The final density of the virialized object is found to be ≊140(Φ+1), where is the matter density at equal matter and radiation energy density. This expression is valid for the entire range of possible values of Φ, both for Φ≫1 and Φ≪1. Some astrophysical consequences of high-density dark-matter clumps are discussed.
- Received 9 March 1994
DOI:https://doi.org/10.1103/PhysRevD.50.769
©1994 American Physical Society