The character of an anisotropic and spherically symmetric star in the presence of a cosmological constant  

作　　者：陈霞 王永久 

机构地区：[1]Institute of Physics, Hunan Normal University, Changsha 410081

出　　处：《Chinese Physics Letters》2009年第7期44-46,共3页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10873004, the Scientific Research Fund of Hunan Provincial Education Department under Crant No 08B051, the Scientific Research Fund of Hunan Normal University and the National Basic Research Program of China under Grant No 2003CB716300.

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 redshiR in terms of the ratio between the cosmological constant and mean energy density of the star.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 redshiR in terms of the ratio between the cosmological constant and mean energy density of the star.

关 键 词：sea surface nonliear interaction numerical method 

分 类 号：O343.8[理学—固体力学] P159[理学—力学]