THE SHAPE OF THE FIRST COLLAPSED OBJECTS

被引:44
作者
SHANDARIN, SF
MELOTT, AL
MCDAVITT, K
PAULS, JL
TINKER, J
机构
[1] Department of Physics and Astronomy, University of Kansas, Lawrence
基金
美国国家科学基金会;
关键词
D O I
10.1103/PhysRevLett.75.7
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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. © 1995 The American Physical Society.
引用
收藏
页码:7 / 10
页数:4
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