Dynamics of spherical stars with structure scalars and R plus εRn cosmology

被引：34

作者：

Sharif, M. ^{[1
]}

Yousaf, Z. ^{[1
]}

机构：

[1] Univ Punjab, Dept Math, Lahore 54590, Pakistan

来源：

CANADIAN JOURNAL OF PHYSICS | 2015年 / 93卷 / 08期

关键词：

DARK-MATTER; MODIFIED GRAVITY; ELECTROMAGNETIC-FIELD; COLLAPSE; ENERGY; STABILITY; INSTABILITY; ANISOTROPY; MODELS;

D O I：

10.1139/cjp-2014-0626

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the role of the R + epsilon R-n model on the dynamical evolution of radiating anisotropic and shearing viscous relativistic spherical stellar structures. In this context, we calculate modified versions of scalar functions (previously defined by L. Herrera et al. Phys. Rev. D, 79, 064025 (2009). doi:10.1103/PhysRevD.79.064025) for the problem under consideration and then associate them with the physical parameters. The Weyl tensor as well as other matter variables with extra curvature terms coming from the model are related and find shear and expansion evolution equations. We conclude that structure scalars along with f(R) degrees of freedom have vital importance in the dynamics of spherical compact systems.

引用

收藏

页码：905 / 911

页数：7

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