Compact stars with quadratic equation of state

被引：71

作者：

Ngubelanga, Sifiso A. ^{[1
]}

Maharaj, Sunil D. ^{[1
]}

Ray, Subharthi ^{[1
]}

机构：

[1] Univ KwaZulu Natal, Astrophys & Cosmol Res Unit, Sch Math Stat & Comp Sci, ZA-4000 Durban, South Africa

来源：

ASTROPHYSICS AND SPACE SCIENCE | 2015年 / 357卷 / 01期

关键词：

Exact solutions; Anisotropy; Electric field intensity; Gravitational potential; MAXWELL FIELD-EQUATIONS; NEUTRON-STAR; MODELS; OBJECTS;

D O I：

10.1007/s10509-015-2247-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We provide new exact solutions to the Einstein-Maxwell system of equations for matter configurations with anisotropy and charge. The spacetime is static and spherically symmetric. A quadratic equation of state is utilised for the matter distribution. By specifying a particular form for one of the gravitational potentials and the electric field intensity we obtain new exact solutions in isotropic coordinates. In our general class of models, an earlier model with a linear equation of state is regained. For particular choices of parameters we regain the masses of the stars PSR J1614-2230, 4U 1608-52, PSR J1903+ 0327, EXO 1745-248 and SAX J1808.4-3658. A comprehensive physical analysis for the star PSR J1903+ 0327 reveals that our model is reasonable.

引用

页码：1 / 9

页数：9