标题： 由合并的中子星双星系统驱动的快速射电暂现现象的重联加速机制 显示英文标题

标题： Reconnection-powered fast radio transients from coalescing neutron star binaries

摘要： 涉及中子星的引力波事件是否以及如何能由电磁对应体先行发生仍然是一个开放性问题。 本研究显示，磁场远低于磁星强度的两个中子星碰撞可以产生类似于毫秒级快速射电暴的瞬变现象。 通过全局强迫零总动量磁流体力学模拟，我们证明了双星磁层中过度扭曲的普通磁通管产生的电磁耀斑会与轨道电流片碰撞并压缩它，从而导致增强的磁重联。 由此，电流片分裂成一连串的等离子体团，这些等离子体团相互碰撞，进而发射出相干的电磁波。 由此产生的持续时间仅为毫秒的辐射爆发应具有频率范围为 $10-20\,\rm GHz$ 的电磁波，其中恒星表面的磁场强度为 $B^{\ast}=10^{11}\, \rm G$。 显示英文摘要

摘要： It is an open question whether and how gravitational wave events involving neutron stars can be preceded by electromagnetic counterparts. This work shows that the collision of two neutron stars with magnetic fields well below magnetar-level strengths can produce millisecond Fast-Radio-Burst-like transients. Using global force-free electrodynamics simulations, we demonstrate that electromagnetic flares, produced by overtwisted common flux tubes in the binary magnetosphere, collide with the orbital current sheet and compress it, resulting in enhanced magnetic reconnection. As a result, the current sheet fragments into a sequence of plasmoids, which collide with each other leading to the emission of coherent electromagnetic waves. The resulting millisecond-long burst of radiation should have frequencies in the range of $10-20\,\rm GHz$ for magnetic fields of $B^{\ast}=10^{11}\, \rm G$ at the stellar surfaces.