论文标题
alfvén波和SGR 1935+2154的快速无线电爆发的浆液射击
Plasmoid ejection by Alfvén waves and the fast radio bursts from SGR 1935+2154
论文作者
论文摘要
使用数值模拟，我们表明，低振幅alfvén波从磁质地震传播到外部磁层，并转换为“粘液型”（封闭的磁环），从恒星加速，将爆炸波驱动到磁场风中。形成后，浆液很快变成了薄的相对论煎饼。它推出了磁层磁场线，它们逐渐在煎饼后面重新连接，从而产生的风远远远强，远比磁体的正常旋风。重复弹出驱动在放大风中驱动爆炸波。我们建议这些弹出产生同时从SGR 1935+2154检测到的X射线和无线电爆发。磁层扰动$ \ sim 10^{40} $ erg的适度能量预算足以产生观察到的爆发。我们的仿真预测磁层的狭窄（几个MS）X射线尖峰几乎同时到达磁层外发出的无线电爆发。这个时机是由射出的极端相对论运动引起的。
Using numerical simulations we show that low-amplitude Alfvén waves from a magnetar quake propagate to the outer magnetosphere and convert to "plasmoids" (closed magnetic loops) which accelerate from the star, driving blast waves into the magnetar wind. Quickly after its formation, the plasmoid becomes a thin relativistic pancake. It pushes out the magnetospheric field lines, and they gradually reconnect behind the pancake, generating a variable wind far stronger than the normal spindown wind of the magnetar. Repeating ejections drive blast waves in the amplified wind. We suggest that these ejections generate the simultaneous X-ray and radio bursts detected from SGR 1935+2154. A modest energy budget of the magnetospheric perturbation $\sim 10^{40}$ erg is sufficient to produce the observed bursts. Our simulation predicts a narrow (a few ms) X-ray spike from the magnetosphere, arriving almost simultaneously with the radio burst emitted far outside the magnetosphere. This timing is caused by the extreme relativistic motion of the ejecta.
