The Character of an Anisotropic and Spherically Symmetric Star in the Presence of a Cosmological Constant

被引：0
|
作者：
Chen Xia [1 ]
Wang Yong-Jiu [1 ]
机构：
[1] Hunan Normal Univ, Inst Phys, Changsha 410081, Hunan, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2009年 / 26卷 / 07期
基金：
中国国家自然科学基金;
关键词：
GENERAL-RELATIVISTIC OBJECTS; MATTER; MASS;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
From the gravitational structure equations of an anisotropic and spherically symmetric star in the presence of a cosmological constant, we derive the inequality which limits the mass-radius ratio, imposing energy conditions on the matter. From this inequality, we display how the cosmological constant modifies the Buchdahl limit, and express the bounds on both the mass-radius ratio and surface redshift in terms of the ratio between the cosmological constant and mean energy density of the star.
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页数：3
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