论文标题
一类暗物质的观察方面
Observational aspects of a class of Dark matter spacetimes
论文作者
论文摘要
如今，各种天体物理和宇宙学观察结果是宇宙中暗物质存在的间接证据。在目前的工作中，我们提出了一类空间，这些空间显示了与暗物质光环的时空相关的一些重要特征。这些空间是爱因斯坦场方程的静态和球面对称溶液。拟议的空间满足了远离中心的银河对象的平坦速度剖面，它们可以很好地同意S2恒星的星体数据，并且它们也给中心阴影带来了中央阴影。使用Penrose图，我们表明，此处中心奇点的因果性质为无效。因此，可以使用用于银河系暗物质的单个时空模型来解释不同长度尺度上银河动力学的某些特性。
Various astrophysical and cosmological observations today serve as an indirect evidence of the existence of dark matter in the universe. In the present work, we propose a class of spacetimes that show some important characteristics relevant to the spacetime of a dark matter halo. These spacetimes are static and spherically symmetric solutions of the Einstein field equations. The proposed spacetimes satisfy the flat velocity profile of a galactic object far away from the center, they give good agreement to the astrometric data of the S2 star, and these also cast a central shadow. Using the Penrose diagram, we show that the causal nature of the central singularity here is null. This single spacetime model for galactic dark matter may therefore be used to explain some of the properties of galactic dynamics at different length scales.
