COSMOLOGICAL MODELS WITH A VARIABLE COSMOLOGICAL TERM AND BULK VISCOUS MODELS

被引：106

作者：

BEESHAM, A ^{[1
]}

机构：

[1] INTER UNIV CTR ASTRON & ASTROPHYS,POONA 411007,INDIA

来源：

PHYSICAL REVIEW D | 1993年 / 48卷 / 08期

关键词：

D O I：

10.1103/PhysRevD.48.3539

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recently, flat variable-A cosmological models have been discussed by Berman. It is shown that these models are equivalent to Perfect fluid models with bulk viscosity which have been presented previously. The model of Berman, which is free of particle creation and which is claimed to solve the entropy problem, is shown to be the usual Einstein-de Sitter model. The nonflat variable-LAMBDA solutions are obtained and their relationship to bulk viscous solutions is elucidated. Exponentially expanding solutions are also derived. The question of the stability of the models is briefly addressed.

引用

页码：3539 / 3543

页数：5

共 50 条

[1] A CRITICAL DENSITY COSMOLOGICAL MODEL WITH VARYING GRAVITATIONAL AND COSMOLOGICAL CONSTANTS [J].