Viscous Chaplygin Gas in Non-flat Universe

被引：35

作者：

Saadat, Hassan ^{[1
]}

Farahani, Hoda ^{[1
]}

机构：

[1] Islamic Azad Univ, Dept Phys, Sepidan Branch, Sepidan, Iran

来源：

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2013年 / 52卷 / 04期

关键词：

FRW cosmology; Bulk viscosity; Chaplygin gas; COSMOLOGICAL CONSTANT; MODEL; CONSTRAINTS; CONSEQUENCES; SUPERNOVAE; FLUID; FRW;

D O I：

10.1007/s10773-012-1431-0

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this work we study viscous Chaplygin gas and obtain modified Friedmann equations due to viscosity. We calculate time-dependent energy density for the case of non-flat universe. By using stability condition and speed of sound we find critical value of viscosity coefficient where speed of sound is finite.

引用

页码：1160 / 1164

页数：5

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