论文标题
迈向旋转黑洞的完整MHD喷气机模型-II：运动学和对M87喷气机的应用
Toward a Full MHD Jet Model of Spinning Black Holes--II: Kinematics and Application to the M87 Jet
论文作者
论文摘要
在本文中，我们研究了由旋转黑洞供电的射流的磁性水力学结构，其中电磁场和流体运动分别受毕业生 - shafranov方程和伯诺利方程的控制。假设稳定和轴对称的射流结构，全局溶液是用规定的等离子体载荷到射流中的唯一确定的，并且最大磁场线的螺状形状。我们将此模型应用于附近宽银河M87中心的射流，我们发现它自然可以解释慢速加速度和流速分层$ 10^5 $重力半径从中央黑洞重力半径。特别是，如果流速测量值以电子/正电子对在射流底座的产生为主导，我们发现极端黑洞自旋不受流速测量的不利影响。
In this paper, we investigate the magnetohydrodynamical structure of a jet powered by a spinning black hole, where electromagnetic fields and fluid motion are governed by the Grad-Shafranov equation and the Bernoulli equation, respectively. Assuming steady and axisymmetric jet structure, the global solution is uniquely determined with prescribed plasma loading into the jet and the poloidal shape of the outmost magnetic field line. We apply this model to the jet in the center of nearby radio galaxy M87, and we find it can naturally explain the slow flow acceleration and the flow velocity stratification within $10^5$ gravitational radii from the central black hole. In particular, we find the extremal black hole spin is disfavored by the flow velocity measurements, if the plasma loading to the jet is dominated by the electron/positron pair production at the jet base.
