论文标题
相对论磁重新连接中的同步子对生产平衡
Synchrotron Pair Production Equilibrium in Relativistic Magnetic Reconnection
论文作者
论文摘要
磁重新连接在天体物理系统中无处不在，在许多这样的系统中，由于同步加速器辐射引起的严重冷却。我们研究了在强烈的同步加速器冷却的情况下研究相对论的磁重新连接，在该系统的环境磁化$σ$中很高，并且系统的磁性紧凑型$ \ ell_ {b} $是秩序统一的。在此制度中，$ e^{\ pm} $对来自同步子光子的生产是不可避免的，并且此过程可以调节当前纸周围的磁化$σ$。我们通过分析进行自我调节，并找到系统的磁性紧凑性和初始磁化的稳态。该结果有助于估计等离子密度受到较差的系统中自洽的上游磁化，并且对于各种天体物理系统可能有用。作为说明性示例，我们将其应用于研究M87超级黑洞附近的电流板的特性，以及蟹脉脉冲星的光缸外的赤道电流板。
Magnetic reconnection is ubiquitous in astrophysical systems, and in many such systems, the plasma suffers from significant cooling due to synchrotron radiation. We study relativistic magnetic reconnection in the presence of strong synchrotron cooling, where the ambient magnetization $σ$ is high and the magnetic compactness $\ell_{B}$ of the system is of order unity. In this regime, $e^{\pm}$ pair production from synchrotron photons is inevitable, and this process can regulate the magnetization $σ$ surrounding the current sheet. We investigate this self-regulation analytically and find a self-consistent steady state for a given magnetic compactness of the system and initial magnetization. This result helps estimate the self-consistent upstream magnetization in systems where plasma density is poorly constrained, and can be useful for a variety of astrophysical systems. As illustrative examples, we apply it to study the properties of reconnecting current sheets near the supermassive black hole of M87, as well as the equatorial current sheet outside the light cylinder of the Crab pulsar.
