Massive cosmic strings in Bianchi type II

被引：21

作者：

Antonio Belinchon, Jose ^{[1
]}

机构：

[1] UPM, ETS Arquitectura, Dept Fis, Madrid 28040, Spain

来源：

ASTROPHYSICS AND SPACE SCIENCE | 2009年 / 323卷 / 03期

关键词：

Bianchi II; Time varying constants; Self-similarity; COSMOLOGICAL CONSTANT; SUPERNOVAE; UNIVERSE; LAMBDA; SINGULARITIES; ENTROPY; OMEGA;

D O I：

10.1007/s10509-009-0065-z

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study a massive cosmic strings with BII symmetries cosmological models in two contexts. The first of them is the standard one with a barotropic equation of state. In the second one we explore the possibility of taking into account variable "constants" (G and I >). Both models are studied under the self-similar hypothesis. We put special emphasis in calculating the numerical values for the equations of state. We find that for omega a(0,1], G, is a growing time function while I >, behaves as positive decreasing time function. If omega=0, both "constants", G and I >, behave as true constants.

引用

页码：307 / 315

页数：9