论文标题
无线电B1839-04的单个脉冲建模和双槽子之前
Single pulse modeling and the bi-drifting subpulses of radio pulsar B1839-04
论文作者
论文摘要
我们研究了双槽脉冲星B1839-04，其中观察到的两个前导脉冲成分中观察到的子孔漂移方向与两个尾随组件中的脉冲分量相反。这种完全反对的明显运动挑战了我们对基本结构的理解。我们发现，对于观察者和脉冲星磁和旋转轴所跨越的几何形状，可以在表面磁场的非二极极构型中复制在B1839-04中观察到的双极性。发现可接受的解决方案要么具有相对较弱的$（\ sim 10^{12} \，{\ rm g}）$或strong $（\ sim 10^{14} \，{\ rm g}）$表面磁场。我们的单个脉冲建模表明，极性盖处的全球电势变化导致火花形成区域的固体旋转旋转有利于重现观察到的漂移特性。潜在的这种变化还确保了所有脉冲成分中的可变性相同，从而导致观察到的子之前的相位锁定。对脉冲星的几何形状的彻底和更一般的研究表明，较低的影响因子与开口角$（β/ρ）$的比例更大，会增加观察到的双滴的可能性。因此，我们得出的结论是，当我们的视线交叉接近磁极时，双槽是可见的。
We study the bi-drifting pulsar B1839-04, where the observed subpulse drift direction in the two leading pulse components is opposite from that in the two trailing components. Such diametrically opposed apparent motions challenge our understanding of an underlying structure. We find that for the geometry spanned by the observer and the pulsar magnetic and rotation axes, the observed bi-drifting in B1839-04 can be reproduced assuming a non-dipolar configuration of the surface magnetic field. Acceptable solutions are found to either have relatively weak $(\sim 10^{12} \,{\rm G})$ or strong $(\sim 10^{14} \,{\rm G})$ surface magnetic fields. Our single pulse modeling shows that a global electric potential variation at the polar cap that leads to a solid-body-like rotation of spark forming regions is favorable in reproducing the observed drift characteristics. This variation of the potential additionally ensures that the variability is identical in all pulse components resulting in the observed phase locking of subpulses. Thorough and more general studies of pulsar geometry show that a low ratio of impact factor to opening angle $(β/ ρ)$ increases the likelihood of bi-drifting to be observed. We thus conclude that bi-drifting is visible when our line of sight crosses close to the magnetic pole.
