标题： 具有规则电荷分布的紧凑模型 显示英文标题

标题： Compact models with regular charge distributions

摘要： 我们用存在电场的情况下具有各向异性压力的紧凑相对论体建模。 状态方程是定压式的，径向压力与能量密度之间有线性关系。 生成了爱因斯坦-麦克斯韦方程的简单精确模型。 图形分析表明，物质和电磁变量表现良好。 特别是，与早期带电各向异性模型不同，在恒星中心的某些参数值下，固有电荷密度是规则的。 我们表明电场影响恒星物体的质量，并且特定双星脉冲星的观测质量得以恢复。 我们的模型包含了先前各向异性带电物质的特殊参数值下的线性状态方程的结果。 显示英文摘要

摘要： We model a compact relativistic body with anisotropic pressures in the presence of an electric field. The equation of state is barotropic with a linear relationship between the radial pressure and the energy density. Simple exact models of the Einstein-Maxwell equations are generated. A graphical analysis indicates that the matter and electromagnetic variables are well behaved. In particular the proper charge density is regular for certain parameter values at the stellar centre unlike earlier anisotropic models in the presence of charge. We show that the electric field affects the mass of stellar objects and the observed mass for a particular binary pulsar is regained. Our models contain previous results of anisotropic charged matter with a linear equation of state for special parameter values.