标题： 膨胀暗物质在Vaidya-De-Sitter时空中的研究 显示英文标题

标题： Dilation Dark Matter in Vaidya-De-Sitter Spacetime

摘要： 相对论性恒星的外部可以用Vaidya辐射度规来模拟。 它是从允许II型流体的广义Vaidya度规开始，并研究了生成爱因斯坦场方程新解析解的条件。 结果显示，在静态情况下，质量参数解给出了经典的德西特宇宙，在时间依赖情况下则给出了与膨胀标量场耦合的扩展德西特度规。 结论是，在时间依赖情况下，相对论性恒星的大气由与暗物质零流体耦合的各向异性弦流体组成，并将标量场解释为产生暗物质的粒子。 显示英文摘要

摘要： The exterior of a relativistic star can be modelated with the Vaidya radiating metric. It is started from the generalized Vaidya metric that allows a type II fluid and studied the conditions of generating new analytical solutions of the Einstein's field equations. It is shown that the mass parameter solution gives the classical de Sitter universe in the static case and the extended de Sitter metric coupled with a dilation scalar field in the time-dependent case. It is concluded that in the time-dependent case the atmosphere of a relativistic star consists on an anisotropic string fluid coupled with a dark matter null fluid and interpreted the scalar field as the particle that produces the dark matter.