Radio emission of the Crab and Crab-like pulsars
Radio emission of the Crab and Crab-like pulsars
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蟹状脉冲星和类蟹状脉冲星的无线电发射
DOI：
10.1093/mnras/sty3233
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发表时间：
2018
影响因子：
4.8
通讯作者：
Y. Lyubarsky
中科院分区：
文献类型：
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作者：
Y. Lyubarsky
脉冲星射电发射通常与开场线管中的等离子体流出有关，然后沿着脉冲星磁轴发射铅笔束。观测结果表明，对于光柱上磁场较高的脉冲星，还有一种额外的射电发射机制。众所周知，这些脉冲星是非热高能辐射的强大来源，这可以归因于电流片的重新连接，就在光柱之外，分离出相反方向的磁场。在光柱(>；100公斤)处具有最高磁场的脉冲星也显示出与高能脉冲同相的射电脉冲。此外，在这些脉冲星中观察到了巨大的射电脉冲。我认为，产生高能量发射的重新连接过程也可能是无线电发射的原因。也就是说，薄片中磁岛的结合产生了以电磁纳米发射的形式传播的磁扰动。我估计了这一发射的参数，并表明它们与观测结果是一致的。
The pulsar radio emission is commonly associated with the plasma outflow in the open field line tube; then a pencil beam is emitted along the pulsar magnetic axis. Observations suggest that there is an additional radio emission mechanism specific for pulsars with high magnetic field at the light cylinder. These pulsars are known to be strong sources of non-thermal high energy radiation, which could be attributed to reconnection in the current sheet separating, just beyond the light cylinder, the oppositely directed magnetic fields. Pulsars with the highest magnetic field at the light cylinder (>100 kG) exhibit also radio pulses in phase with the high energy pulses. Moreover, giant radio pulses are observed in these pulsars. I argue that the reconnection process that produces high energy emission could also be responsible for the radio emission. Namely, coalescence of magnetic islands in the sheet produces magnetic perturbations that propagate away in the form of electro-magnetic nano-shots. I estimate the parameters of this emission and show that they are compatible with observations.