论文标题
部分可观测时空混沌系统的无模型预测
Dark matter admixed neutron star properties in the light of X-ray pulse profile observations
论文作者
论文摘要
暗物质（DM）在DM-Admixed-Neutron Star（DANSS）中的分布被认为是密集的深色核心或扩展的深色光环，该黑色芯片受DM的DM分数（$f_χ$）和DM属性的约束，例如质量（$m_χ$），以及自我内置的强度（$ y $ y $ $ $ $）。在本文中，我们对深核/深色光环的形成标准进行了深入的分析，并指出这两个组件的相对分布基本上取决于DM成分的中央焓与Danss内部的Baryonic物质成分的比率。对于DM和Baryonic物质半径相同的关键情况，我们进一步得出了一个分析公式，以描述$ f^{\ rm crit}_χ$对给定dans质量的$m_χ$和$ y $的依赖性。两个成分在DANS中的相对分布会导致不同的观察效应。在这里，我们关注脉冲星脉冲轮廓的修改，这是由于存在较深的挂用效应，并首次研究了深 - 霍洛对脉冲曲线的影响。我们发现峰值通量偏差在很大程度上取决于光环质量与DM分量半径的比率。最后，我们根据Neutron Star Interior Composition Explorer对PSR J0030+0451和PSR J0740+6620的最新X射线观测来对DM粒子性质进行贝叶斯参数估计。
The distribution of the dark matter (DM) in DM-admixed-neutron stars (DANSs) is supposed to be either a dense dark core or an extended dark halo, which is subject to the DM fraction of DANS ($f_χ$) and the DM properties, such as the mass ($m_χ$) and the strength of the self-interaction ($y$). In this paper, we perform an in-depth analysis of the formation criterion for dark core/dark halo and point out that the relative distribution of these two components is essentially determined by the ratio of the central enthalpy of the DM component to that of the baryonic matter component inside DANSs. For the critical case where the radii of DM and baryonic matter are the same, we further derive an analytical formula to describe the dependence of $f^{\rm crit}_χ$ on $m_χ$ and $y$ for given DANS mass. The relative distribution of the two components in DANSs can lead to different observational effects. We here focus on the modification of the pulsar pulse profile due to the extra light-bending effect in the case of a dark-halo existence and conduct the first investigation of the dark-halo effects on the pulse profile. We find that the peak flux deviation is strongly dependent on the ratio of the halo mass to the radius of the DM component. Lastly, we perform Bayesian parameter estimation on the DM particle properties based on the recent X-ray observations of PSR J0030+0451 and PSR J0740+6620 by the Neutron Star Interior Composition Explorer.
