arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1701.09153astro-ph.HE
收藏

我们最近对螃蟹的了解:风的结构,冲击,耀斑和重连

What we recently learnt about Crab: structure of the wind, the shock, flares and reconnection

Maxim Lyutikov

摘要:

我们可以探测观测和理论上再现最接近脉冲星的蟹状星云的复杂性质-内结。这个微小的结确实是一个准静态磁相对论激波表面的亮点,它可以加速粒子。产生内结的风必须具有较低的磁化强度;因此,它不是伽马射线耀斑的场所。本文提出了一个相对论性强磁化等离子体爆炸重联过程中粒子加速的模型,并应用该模型解释了蟹状星云伽玛射线耀斑。在磁通量合并的初始阶段,通过电荷饥饿的DC型电场有效地加速颗粒。由此可见,磁重联是高能天体物理源中粒子加速的一个重要过程,而且可能是主要过程。

英文摘要:

We can probe observationally and reproduce theoretically intricate properties of the Crab Nebula nearest to the pulsar - The Inner Knot. The tiny knot is indeed a bright spot on the surface of a quasi-stationary magnetic relativistic shock that accelerates particles. It is required that the part of the wind that produces the Inner Knot has low magnetization; thus, it is not a site of gamma-ray flares. We develop a model of particle acceleration during explosive reconnection events in relativistic highly magnetized plasma and apply the model to explain the Crab gamma-ray flares. Particles are efficiently accelerated by charge-starved DC-type electric fields during initial stages of magnetic flux merges. By implication, the magnetic reconnection is an important, and possibly dominant process of particle acceleration in high energy astrophysical sources.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑