Superclusters as nondissipative pancakes: flattening
Journal Article
·
· Astrophys. J.; (United States)
The formation and dynamical evolution of flat superclusters (SCs) out of adiabatic perturbations of the Zel'dovich type are studied by means of N-body simulations in an Einstein--de Sitter universe, and by an approximate model in an open universe. A nondissipative formation scenario, in which galaxies or other substructures form prior to the collapse of SCs from small-scale perturbations, is found to be compatible with the observed flattening of the Local Supercluster (LSC) and of external SCs, and with their pancake-halo structure. In the best fitting model the LSC has collapsed in one dimension only recently, where 20--50% of the galaxies have crossed the plane by now, corresponding to a caustic at 0
- OSTI ID:
- 6080201
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 264:2; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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