The Shape of the First Collapsed Objects
- 3 July 1995
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 75 (1), 7-10
- https://doi.org/10.1103/physrevlett.75.7
Abstract
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 -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.
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