论文标题
观察中子星中暗物质的热化
Observing the thermalization of dark matter in neutron stars
论文作者
论文摘要
揭示颗粒暗物质的有希望的探针是观察其对中子恒星的影响，其前景严格取决于是否通过恒星核心及时用费米定性培养基散射捕获的暗物质是否及时用恒星核心进行热效应。在这项工作中，我们估算了多种情况的热化的时间尺度。其中包括：（a）spin-0和旋转 - $ \ frac {1} {2} $暗物质，（b）在非相关性中子和相对论电子目标上散射，该目标是相应的动力学，（c）通过lorentz-Invariant结构的范围（d）与识别型相比，相比之下的范围是，相互作用的相互作用均与之相比，相比之下。我们讨论了热化时间与暗物质和介体质量的函数以及恒星温度的分析行为。最后，我们确定了恒星捕获效率的参数范围，并且在宇宙年代内进行热化。对于可以在核心中消灭的暗物质，这些区域表明参数范围可以通过即将到来的红外望远镜观察冷中子星来探测。
A promising probe to unmask particle dark matter is to observe its effect on neutron stars, the prospects of which depend critically on whether captured dark matter thermalizes in a timely manner with the stellar core via repeated scattering with the Fermi-degenerate medium. In this work we estimate the timescales for thermalization for multiple scenarios. These include: (a) spin-0 and spin-$\frac{1}{2}$ dark matter, (b) scattering on non-relativistic neutron and relativistic electron targets accounting for the respective kinematics, (c) interactions via a range of Lorentz-invariant structures, (d) mediators both heavy and light in comparison to the typical transfer momenta in the problem. We discuss the analytic behavior of the thermalization time as a function of the dark matter and mediator masses, and the stellar temperature. Finally, we identify parametric ranges where both stellar capture is efficient and thermalization occurs within the age of the universe. For dark matter that can annihilate in the core, these regions indicate parametric ranges that can be probed by upcoming infrared telescopes observing cold neutron stars.
