论文标题
SIDM光环的重生溶液：从恒定到速度依赖性横截面的映射
Gravothermal solutions of SIDM halos: mapping from constant to velocity-dependent cross section
论文作者
论文摘要
长期以来，无尺度的重生流体形式主义已被证明有效地描述了用恒定的暗物质粒子横截面来描述自相互作用的暗物质光环的演变。然而，是否符合速度依赖性横截面情景的数值模拟的重生流体溶液仍然未经测试。在这项工作中，我们提供了一种快速映射方法，该方法将恒定横截面的晶状体溶液与横截面中任意速度依赖性的模型相关联。我们表明，映射后的重生溶液与AREPO N体型模拟结果非常吻合。我们通过将这种快速映射方法应用于容纳低表面亮度Galaxy UGC 128的光环来说明了这种方法的功能。我们表明，这种快速映射方法可用于在物理动机的横截面模型中约束自由参数，并说明由旋转曲线测量所青睐的参数空间。
The scale-free gravothermal fluid formalism has long proved effective in describing the evolution of self-interacting dark matter halos with a constant dark matter particle cross section. However, whether the gravothermal fluid solutions match numerical simulations for velocity-dependent cross-section scenarios remains untested. In this work, we provide a fast mapping method that relates the constant-cross-section gravothermal solution to models with arbitrary velocity dependence in the cross section. We show that the gravothermal solutions after mapping are in good agreement with Arepo N-Body simulation results. We illustrate the power of this approach by applying this fast mapping method to a halo hosting a low surface brightness galaxy UGC 128. We show that this fast mapping method can be used to constrain free parameters in a physically motivated cross-section model and illustrate parameter space favored by the rotation curve measurement.
