1994/07/31 by S. F. Shandarin, Adrian L. Melott, A. L. Melott +5 · 4 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #astro-ph #gr-qc
paper · pdf · doi:10.1103/physrevlett.75.7
published as Phys.Rev.Lett. 75 (1995) 7-10 · 12 pages (excluding figures); LaTeX (revtex style); figures may be obtained via anonymous ftp at ftp://kusmos.phsx.ukans.edu/preprints/sergei/shapes/ to be published in in Phys. Rev. Lett. Revisions include more detail on the nature of the objects and the initial conditions
arxiv created 1995/04/21 · openalex publication_date 1995/07/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In the early seventies, there was a conjecture (based on the Zel'dovich approximate solution) that the first collapse of a self-gravitating dustlike medium (appropriate approximation for nonbaryonic dark matter) results in the formation of a ``pancake'' object that is a thin surface. Recent works cast doubt on the Zel'dovich conjecture, suggesting that the first collapse might be pointlike or filamentlike rather than pancakelike. Our N-body simulations show first pancake collapse. We can reject with 97% confidence the Bayesian prior that the other kinds of collapse are more or equally probable.