The detection of gravitational waves emitted during a neutron star–black hole merger and the associated electromagnetic counterpart will provide a wealth of information about stellar evolution nuclear matter, and general relativity. While the theoretical framework about neutron star–black hole binaries formed in isolation is well established, the picture is loosely constrained for those forming via dynamical interactions. Here, we use N-body simulations to show that mergers forming in globular and nuclear clusters could display distinctive marks compared to isolated mergers, namely larger masses, heavier black holes, and the tendency to have no associated electromagnetic counterpart. These features could represent a useful tool to interpreting forthcoming observations. In the local Universe, gravitational waves emitted from dynamical mergers could be unraveled by detectors sensitive in the decihertz frequency band, while those occurring at the distance range of Andromeda and the Virgo Cluster could be accessible to lower-frequency detectors like LISA.

对中子星－黑洞合并以及相关的电磁对应物发出的引力波的检测将提供有关恒星演化核物质和广义相对论的大量信息。尽管关于隔离形成的中子星-黑洞双星的理论框架已经很好地建立了，但是对于那些通过动力相互作用形成的星，黑洞双星的图像受到了宽松的约束。在这里，我们使用N体模拟显示，与孤立的合并相比，球形和核簇中形成的合并可以显示出独特的标记，即较大的质量，较重的黑洞以及没有关联的电磁对应物的趋势。这些功能可能是解释即将出现的观察结果的有用工具。在本地宇宙中，动态合并产生的引力波可以被在十亿赫兹频带内敏感的探测器解开，而那些在仙女座和处女座星团距离范围内发生的探测器则可以被LISA等低频探测器访问。