Gravitational Collapse in an Expanding Universe: Asymptotic Selfsimilar Solutions
Abstract
The collapse and virialization of selfsimilar spherical density perturbations to a flat Einstein e Sitter universe is investigated and in particular the asymptotic similarity solutions. Previous calculations of Gunn and Fillmore & Goldreich of the asymptotic solutions are improved here and the collapse factor of a given spherical shell is calculated. Within the framework of the asymptotic behavior exact analytical solutions are obtained.
 Publication:

The Astrophysical Journal
 Pub Date:
 October 1993
 DOI:
 10.1086/173246
 Bibcode:
 1993ApJ...416..410Z
 Keywords:

 COSMOLOGY: LARGESCALE STRUCTURE OF UNIVERSE;
 COSMOLOGY: THEORY;
 GALAXIES: FORMATION