Shear-free and homology conditions for self-gravitating dissipative fluids

被引：59

作者：

Herrera, L ^{[1
]}

Santos, NO

机构：

[1] Cent Univ Venezuela, Fac Ciencias, Escuela Fis, Caracas, Venezuela

[2] Univ Paris 06, CNRS, UMR 8540,LRM, ERGA, F-75005 Paris 05, France

[3] Lab Nacl Comp Cient, BR-25651070 Petropolis, RJ, Brazil

[4] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, Brazil

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2003年 / 343卷 / 04期

关键词：

diffusion; gravitation; hydrodynamics; radiation mechanisms : general; relativity; stellar dynamics;

D O I：

10.1046/j.1365-8711.2003.06764.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The shear-free condition is studied for dissipative relativistic self-gravitating fluids in the quasi-static approximation. It is shown that, in the Newtonian limit, such a condition implies the linear homology law for the velocity of a fluid element, only if homology conditions are further imposed on the temperature and the emission rate. It is also shown that the shear-free plus the homogeneous expansion rate conditions are equivalent (in the Newtonian limit) to the homology conditions. Deviations from homology and their prospective applications to some astrophysical scenarios are discussed, and a model is worked out.

引用

页码：1207 / 1212

页数：6

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