Numerical Study for Relativistic Outflows in Magnetically Dominated Region

以相对论速度流出的物质出现在各种天体中，如脉冲星、伽马射线爆发和黑洞周围的吸积盘。强磁场一直被认为是它们的一个重要作用，但对其实际机制的理论理解仍然存在。在这项科学研究补助金的支持期间，取得了两大成果。一种是基于等离子体双流体近似的脉冲星磁层的数值构造。另一类是高磁化情况下的磁重联研究。指出这一速率与磁雷诺数和磁化参数有关。

Outflows with relativistic speed appear in various astrophysical objects such as pulsars, gamma-ray bursts and accretion disks around a black hole. Strong magnetic field has been considered to be an important role on them, but theoretical understanding of the actual mechanism still remains. During the period supported by this Grant-in-Aid for Scientific Research, two major results are achieved. One is numerical construction of pulsar magnetosphere in terms of two-fluid approximation for the plasma. The other is the study of magnetic reconnection in highly magnetized situation. It is pointed out that the rate depends on the magnetic Reynolds number and magnetized parameter.