Mergers of magnetized neutron stars with spinning black holes: disruption, accretion, and fallback.

We investigate the merger of a neutron star in orbit about a spinning black hole in full general relativity with a mass ratio of 5:1, allowing the star to have an initial magnetization of 10(12)  G. We present the resulting gravitational waveform and analyze the fallback accretion as the star is disrupted. We see no significant dynamical effects in the simulations or changes in the gravitational waveform resulting from the initial magnetization. We find that only a negligible amount of matter becomes unbound; 99% of the neutron star material has a fallback time of 10 seconds or shorter to reach the region of the central engine and that 99.99% of the star will interact with the central disk and black hole within 3 hours.

我们在完全广义相对论下研究了一颗中子星围绕一个质量比为5∶1的旋转黑洞的并合，允许该中子星具有\(10^{12}\)高斯的初始磁化强度。我们给出了所产生的引力波形，并分析了中子星被瓦解时的回落吸积。在模拟中我们没有看到由初始磁化导致的显著动力学效应，也没有看到引力波形的变化。我们发现只有极少量的物质变得不受束缚；99%的中子星物质回落至中心引擎区域的时间为10秒或更短，并且99.99%的中子星物质将在3小时内与中心盘和黑洞相互作用。