The effects of anticorrelation on gravitational clustering

被引:10
|
作者
Kanekar, N
Padmanabhan, T
机构
[1] Natl Ctr Radio Astrophys, Pune 411007, Maharashtra, India
[2] Interuniv Ctr Astron & Astrophys, Pune 411007, Maharashtra, India
关键词
cosmology : theory; dark matter; large-scale structure of Universe;
D O I
10.1046/j.1365-8711.2001.04381.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We use non-linear scaling relations (NSRs) to investigate the effects arising from the existence of negative correlations on the evolution of gravitational clustering in an expanding universe. It turns out that such anticorrelated regions have important dynamical effects on all scales. In particular, the mere existence of negative values for the linear two-point correlation function <(<xi>)over bar>(L) over some range of scales starting from l = L-0 implies that the non-linear correlation function is bounded from above at all scales x < L-0. This also results in the relation <(<xi>)over bar> proportional to x(-3), at these scales, at late times, independent of the original form of the correlation function. Current observations do not rule out the existence of negative <(<xi>)over bar> for 200 h(-1) Mpc less than or similar to <(<xi>)over bar> less than or similar to 1000 h(-1) Mpc; the present work may thus have relevance for the real Universe. The only assumption made in the analysis is the existence of NSR; the results are independent of the form of the NSR as well as of the stable clustering hypothesis.
引用
收藏
页码:988 / 998
页数:11
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