ZELDOVICH APPROXIMATION AND THE PROBABILITY-DISTRIBUTION FOR THE SMOOTHED DENSITY FIELD IN THE NONLINEAR REGIME

被引：21
|
作者：
PADMANABHAN, T [1 ]
SUBRAMANIAN, K [1 ]
机构：
[1] NATL CTR RADIO ASTROPHYS,TIFR,POONA 411007,INDIA
来源：
ASTROPHYSICAL JOURNAL | 1993年 / 410卷 / 02期
关键词：
COSMOLOGY; THEORY; LARGE-SCALE STRUCTURE OF UNIVERSE;
D O I：
10.1086/172764
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The study of large-scale structures in the universe is often based on the observed density distribution of matter smoothed by a suitable filter function. The probability distribution for this smoothed density field in the nonlinear regime is studied using the Zel'dovich approximation. When the shear term of the velocity field is not too large, one can obtain a reasonably good analytic approximation to this probability distribution. The properties of this distribution are discussed and compared with other attempts along similar lines.
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页码：482 / 487
页数：6
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