LOCAL APPROXIMATIONS TO NONLINEAR EVOLUTION OF DENSITY-FLUCTUATIONS

被引：10

作者：

BETANCORTRIJO, J

机构：

[1] Astronomy Centre, University of Sussex, Falmer, Brighton

[2] Instituto de Astrofisica de Canarias, La Laguna, Tenerife

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1991年 / 251卷 / 03期

关键词：

D O I：

10.1093/mnras/251.3.399

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show how the evaluation of any moment of the mass distribution, as given by the Zeldovich approximation, may be reduced to the computation of an integral. In this way we compute the present rms density fluctuation in a cold dark matter model and find it close to its linear value when this value is of order one. The arguments presented here are valid for a set of approximations that we call local approximations, and the expediency of some of them is discussed.

引用

页码：399 / 407

页数：9

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