我们最终能理解暗物质速度各向异性的起源吗？
Might we eventually understand the origin of the dark matter velocity anisotropy?
摘要：
模拟的暗物质结构的密度分布是相当确定的，并且已经提出了对其特征的几种解释。相反，速度各向异性的径向变化仍然没有得到解释。我们建议一个非常简单的起源，基于速度分布函数的形状，这是不同的径向和切向方向。这使我们能够得到一个径向变化的各向异性配置文件，这是在很好的协议与模拟和观察。这一建议的后果之一是，一旦密度分布已知，速度各向异性就完全确定了。我们证明了这是如何解释γ-β关系的起源，这是密度剖面的斜率和速度各向异性之间的联系。这些发现为我们提供了一个强大的工具，使我们能够关闭牛仔裤方程。
英文摘要：
The density profile of simulated dark matter structures is fairly well-established, and several explanations for its characteristics have been put forward. In contrast, the radial variation of the velocity anisotropy has still not been explained. We suggest a very simple origin, based on the shapes of the velocity distributions functions, which are shown to differ between the radial and tangential directions. This allows us to derive a radial variation of the anisotropy profile which is in good agreement with both simulations and observations. One of the consequences of this suggestion is that the velocity anisotropy is entirely determined once the density profile is known. We demonstrate how this explains the origin of the γ-βrelation, which is the connection between the slope of the density profile and the velocity anisotropy. These findings provide us with a powerful tool, which allows us to close the Jeans equations.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
