论文标题
蜘蛛脉冲星中静脉冲击的全局动力学建模
Global Kinetic Modeling of the Intrabinary Shock in Spider Pulsars
论文作者
论文摘要
蜘蛛脉冲星是由毫秒脉冲星和低质量伴侣组成的紧凑型二元系统。相对论的磁性脉冲星风影响伴侣，消融并慢慢消耗其大气。该相互作用形成了内部冲击，这是粒子加速度的提议位点。假设Pulsar风由交替的极性的平行条件组成，并且冲击围绕同伴围绕伴侣，我们对内部冲击进行全局全动态粒子模拟。我们发现，通过冲击驱动的重新连接有效地加速了颗粒。我们提取与X射线观测非常吻合的第一原理同步谱和灯曲面：（1）同步子光谱几乎是平坦的，$f_ν\ propto {\ rm const} $; （2）当Pulsar旋转轴几乎与轨道角动量对齐时，光曲线在Pulsar Eclipse（Pulsar Exuprics conejunction）之前和之后显示两个峰，并在相相分离$ \ sim 0.8 \，{\ rm rad} $; （3）峰值通量超过下部连接的峰值磁通量十倍。我们证明了Lightcurve中的双峰签名是由于震后流动中的多普勒提升。
Spider pulsars are compact binary systems composed of a millisecond pulsar and a low-mass companion. The relativistic magnetically-dominated pulsar wind impacts onto the companion, ablating it and slowly consuming its atmosphere. The interaction forms an intrabinary shock, a proposed site of particle acceleration. We perform global fully-kinetic particle-in-cell simulations of the intrabinary shock, assuming that the pulsar wind consists of plane-parallel stripes of alternating polarity and that the shock wraps around the companion. We find that particles are efficiently accelerated via shock-driven reconnection. We extract first-principles synchrotron spectra and lightcurves which are in good agreement with X-ray observations: (1) the synchrotron spectrum is nearly flat, $F_ν\propto {\rm const}$; (2) when the pulsar spin axis is nearly aligned with the orbital angular momentum, the light curve displays two peaks, just before and after the pulsar eclipse (pulsar superior conjunction), separated in phase by $\sim 0.8\, {\rm rad}$; (3) the peak flux exceeds the one at inferior conjunction by a factor of ten. We demonstrate that the double-peaked signature in the lightcurve is due to Doppler boosting in the post-shock flow.
