论文标题
磁层磁层中重新连接的快速无线电爆发
Fast radio bursts from reconnection in magnetar magnetosphere
论文作者
论文摘要
据报道，几乎100％线性极化的快速无线电爆发。这一发现对排放机制施加了严重的限制。我认为，完全极化的辐射可以在磁力外磁层的相对论磁重新连接过程中产生。在磁力耀斑的开始时，大规模的磁扰动形成了磁性脉冲，从耀斑向外引用。脉冲强烈压缩磁层等离子体并将其推开。当磁性脉冲到达当前板分离时，就会产生高频MHD波，就在轻圆柱之外，相反的磁场。重新连接电流板中磁岛的合并会产生磁波，随着无线电波沿磁场的旋转轴极化，在磁脉冲的顶部传播并在风的远区域中逃脱。我估计了即将辐射的参数，并表明它们与观察到的FRB的特性兼容。
The nearly 100% linear polarization has been reported for a few fast radio bursts. This finding places severe limits on the emission mechanism. I argue that the totally polarized radiation could be generated in the course of relativistic magnetic reconnection in the outer magnetosphere of the magnetar. At the onset of the magnetar flare, a large scale magnetic perturbation forms a magnetic pulse, which propagates from the flare cite outwards. The pulse strongly compresses magnetospheric plasma and pushes it away. The high-frequency MHD waves are generated when the magnetic pulse reaches the current sheet separating, just beyond the light cylinder, the oppositely directed magnetic fields. Coalescence of magnetic islands in the reconnecting current sheet produces magnetosonic waves, which propagate away on the top of the magnetic pulse and escape in the far zone of the wind as radio waves polarized along the rotational axis of the magnetar. I estimate parameters of the outgoing radiation and show that they are compatible with the observed properties of FRBs.
