AI 中文总结
本研究发现致密暗物质晕会使X射线反射光谱推断的黑洞自旋等参数出现偏差，同时提出纳入该环境的反射模型可补充引力波探测以约束暗物质晕参数。
AI 中文摘要
X射线反射光谱学是一种成熟的黑洞（BH）自旋与吸积几何探测手段，已有诸多研究探讨其系统不确定性。本研究探索与致密暗物质（DM）晕相关的潜在环境效应，采用数值黑洞-暗物质时空并开展广义相对论光线追踪计算，生成展宽的铁Kα线轮廓。在所研究的构型中，致密暗物质晕会使铁Kα线相对于克尔（Kerr）对应体向更低的观测能量偏移；用标准克尔模型拟合模拟轮廓后发现，推断出的自旋与倾角可能与输入值存在差异，部分情况下自旋被高估。这些结果表明，致密暗物质晕可能为基于反射的测量引入额外不确定性；反之，纳入该环境的反射模型最终或可帮助约束晕的关键参数（如质量与特征尺度），为引力波探测提供补充。
英文摘要
X-ray reflection spectroscopy is an established probe of black hole (BH) spin and accretion geometry, and many studies have examined its systematic uncertainties. In this work, we explore a possible environmental effect associated with compact dark matter (DM) halos. We adopt numerical BH-DM spacetimes and perform general-relativistic ray-tracing calculations to generate broadened Fe\, K$α$ line profiles. For the configurations studied here, compact DM halos shift the lines toward lower observed energies relative to their Kerr counterparts. We fit the simulated profiles with standard Kerr models and find that the inferred spin and inclination can differ from their input values; in some cases, the spin is overestimated. These results suggest that compact DM halos may introduce an additional uncertainty in reflection-based measurements. Conversely, reflection models that include the environment could ultimately help constrain key halo parameters, such as its mass and characteristic scale, complementing gravitational-wave probes.
Comments9 pages, 5 figures
