论文标题
二元紧凑型恒星电磁场和引力波的电磁体的分析性能
Analytic properties of electromagnetic field of binary compact stars and electromagnetic precursors to gravitational waves
论文作者
论文摘要
我们通过分析研究真空中电磁场的特性，围绕含有至少一个中子恒星的近二元紧凑型恒星。我们表明，中子恒星的轨道运动在合并之前会诱导电磁场的高多极模式。这些模式被叠加以形成螺旋臂构型，并发现其边缘可能是磁重新连接的位置。这些模式还增加了中子恒星二进制的总po循环，倍数为2--4。我们还指出，轨道运动诱导的电场导致二进制周围的磁层并估算其血浆密度，其参数依赖性与Goldreich-Julian密度不同。借助这些特性，我们讨论了引力波事件的可能的电磁对应物，并将无线电前体（例如快速无线电爆发）识别为最有希望的观察目标。
We analytically study the properties of the electromagnetic field in vacuum around close binary compact stars containing at least one neutron star. We show that the orbital motion of the neutron star induces high multipole modes of the electromagnetic field just before the merger. These modes are superimposed to form a spiral arm configuration and its edge is found to be a likely site for magnetic reconnection. These modes also enhance the total Poynting flux from neutron star binaries by a factor of 2--4. We also indicate that the electric field induced by the orbital motion lead to a magnetosphere around binaries and estimate its plasma density, which has a different parameter dependence than Goldreich-Julian density. With these properties, we discuss possible electromagnetic counterparts to gravitational wave events, and identify radio precursors, such as fast radio bursts, as the most promising observational targets.
