标题： 极小膨胀重力中具有多态方程的紧凑星体 显示英文标题

标题： Compact statis stars with polytropic equation of state in minimal dilatonic gravity

摘要： 我们提出了在最小稀疏引力模型（MDG）中，相对论静态球对称星体（SSSS）的方程解，使用了多态方程状态。 一种与更现实的方程状态具有良好拟合的多态方程状态被使用。 得到了MDG模型中单个中子星所有变量的结果。 最大质量约为两个太阳质量，这与最新脉冲星观测结果一致。 对于与稀疏子$\Phi$和宇宙常数$\Lambda$相关的变量观察到了几种新效应。 还得到了质量-半径关系。 特别关注描述类似于MDG中暗能量和暗物质效应的量的行为。 本文的结果证实了稀疏子$\Phi$能够同时扮演暗能量和暗物质的角色这一结论。 显示英文摘要

摘要： We present solution of the equations for relativistic static spherically symmetric stars (SSSS) in the model of minimal dilatonic gravity (MDG) using the polytropic equation of state. A polytropic equation of state, which has a good fitting with a more realistic one, is used. Results are obtained for all variables of a single neutron star in the model of MDG. The maximum mass about two solar masses is in accordance with the latest observations of pulsars. Several new effects are observed for the variables related with the dilaton $\Phi$ and the cosmological constant $\Lambda$. The mass-radius relation is also obtained. Special attention is paid to the behavior of the quantities which describe the effects analogous to those of dark energy and dark matter in MDG. The results of the present paper confirm the conclusion that the dilaton $\Phi$ is able to play simultaneously the role of dark energy and dark matter.