Asymptotic symmetries in cosmological models

被引：1
|
作者：
di Teodoro, Antonio [2 ]
Villalba, Victor M. [1 ]
机构：
[1] IVIC, Ctr Fis, Caracas 1020A, Venezuela
[2] Univ Simon Bolivar, Dept Matemat, Caracas 1080A, Venezuela
来源：
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2008年 / 47卷 / 07期
关键词：
asymptotic symmetries; cosmology;
D O I：
10.1007/s10773-007-9633-6
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In the present article we study asymptotic isometries and asymptotic conformal Killing motions of some anisotropic Bianchi cosmological models. We show that asymptotically isotropic homogeneous cosmological spaces can be covariantly studied and characterized using scalars constructed with the help the Killing equations. We exhibit some illustrative examples of space-times possessing asymptotic Killing collineations. We apply our results in order to discuss asymptotic symmetries associated with scalar cosmological perturbations.
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页码：1885 / 1890
页数：6
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