Self-Similar Solutions of a Gravitating Dark Fluid

被引：2

作者：

Barna, Imre Ferenc ^{[1
]}

Pocsai, Mihaly Andras ^{[1
,2
]}

Barnafoldi, Gergely Gabor ^{[1
]}

机构：

[1] Wigner Res Ctr Phys, 29-33 Konkoly-Thege Miklos Str, H-1121 Budapest, Hungary

[2] Univ Pecs, Inst Phys, Dept Phys, 6 Ifjusag Utja, H-7624 Pecs, Hungary

来源：

MATHEMATICS | 2022年 / 10卷 / 18期

关键词：

dark fluid; stiff matter; self-similar solution; analytic relativistic solution; ANISOTROPY; ENERGY;

D O I：

10.3390/math10183220

中图分类号：

O1 [数学];

学科分类号：

0701 ; 070101 ;

摘要：

In this paper, a fluid model is presented which contains the general linear equation of state including the gravitation term. The obtained spherical symmetric Euler equation and the continuity equations were investigated with the Sedov-type time-dependent self-similar ansatz which is capable of describing physically relevant diffusive and disperse solutions. The result of the space and time-dependent fluid density and radial velocity fields are presented and analyzed. Additionally, the role of the initial velocity on the kinetic and total energy densities of the fluid is discussed. This leads to a model, which can be considered as a simple model for a dark-fluid.

引用

页数：11

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