论文标题
暗物质的数值模拟混合了中子星二进制
Numerical Simulations of Dark Matter Admixed Neutron Star Binaries
论文作者
论文摘要
对紧凑型二进制合并的多理智观察提供了一种新的方法来限制可能在中子恒星和周围积累的暗物质的性质。在本文中，我们扩展了数值余量代码BAM的基础架构，以实现中子星的模拟，该中子星有一个附加的镜像暗物质组件。我们执行单星测试以验证我们的代码和此类的第一个二进制中子星模拟。我们发现暗物质的存在减少了合并残留的寿命，并有利于迅速崩溃到黑洞。此外，我们发现与总质量比和质量比相同但不同的暗物质的系统的合并时间差异。最后，我们发现由用暗物质混合的二进制中子星的合并产生的电磁信号非常不可能像无暗物质的对应物一样明亮。鉴于多通讯社设施的灵敏度越来越大，我们的分析给出了如何探测暗物质存在的新观点。
Multi-messenger observations of compact binary mergers provide a new way to constrain the nature of dark matter that may accumulate in and around neutron stars. In this article, we extend the infrastructure of our numerical-relativity code BAM to enable the simulation of neutron stars that contain an additional mirror dark matter component. We perform single star tests to verify our code and the first binary neutron star simulations of this kind. We find that the presence of dark matter reduces the lifetime of the merger remnant and favors a prompt collapse to a black hole. Furthermore, we find differences in the merger time for systems with the same total mass and mass ratio, but different amounts of dark matter. Finally, we find that electromagnetic signals produced by the merger of binary neutron stars admixed with dark matter are very unlikely to be as bright as their dark matter free counterparts. Given the increasing sensitivity of multi-messenger facilities, our analysis gives a new perspective on how to probe the presence of dark matter.
