Perfect fluid cosmological Universes: One equation of state and the most general solution

被引：8

作者：

Das, Anadijiban ^{[1
]}

Banerjee, Asit ^{[2
]}

Chakraborty, Subenoy ^{[3
]}

Pan, Supriya ^{[4
]}

机构：

[1] Simon Fraser Univ, Dept Math, Burnaby, BC V5A 1S6, Canada

[2] Jadavpur Univ, Dept Phys, Kolkata 700032, India

[3] Jadavpur Univ, Dept Math, Kolkata 700032, India

[4] Indian Inst Sci Educ & Res, Dept Phys Sci, Kolkata 741246, Mohanpur, India

来源：

PRAMANA-JOURNAL OF PHYSICS | 2018年 / 90卷 / 02期

关键词：

Perfect fluid; equation of state; cosmological solutions;

D O I：

10.1007/s12043-017-1511-z

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Considering a homogeneous and isotropic Universe characterised by the Friedmann-Lemaitre-Robertson-Walker line element, in this work, we have prescribed a general formalism for the cosmological solutions when the equation of state of the cosmic substance follows the general structure phi(p, rho) = 0, where p, rho are respectively the pressure and the energy density of the cosmic substance. Using the general formalism we recover some well-known solutions, namely, when the cosmic substance obeys the linear equation of state, a Chaplygin-type equation of state, or a nonlinear equation of state. Thus, the current work offers a new technique to solve the cosmological solutions without any prior relation between p and rho.

引用

页数：6

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