标题： 厚吸积盘中的磁场活动及相关可观测现象 I. 通量排斥 显示英文标题

标题： Magnetic Activity in Thick Accretion Disks and Associated Observable Phenomena I. Flux Expulsion

摘要： 我们研究了黑洞周围的非磁性厚吸积盘内关于旋转轴对称的环形磁通管的动力学。我们提出了包含重力、离心力、压力梯度力、科里奥利力、阻力、磁张力和磁浮力效应的模型方程。我们假设盘是绝热的来求解这些方程。我们表明，在描述尺寸和磁场强度以及盘内角动量分布的广泛参数范围内，浮力磁通管，无论是从赤道面释放还是从盘的外边缘释放，都可以聚集在接近轴线的烟囱状开口附近。这种行为使烟囱在磁场中最活跃，并可能有助于揭示宇宙喷流的起源和加速，以及耀变体中观测到的变化。 显示英文摘要

摘要： We study the dynamics of toroidal magnetic flux tubes, symmetric about the rotation axis, inside non-magnetic thick accretion disks around black holes. We present model equations which include effects of gravity, centrifugal force, pressure gradient force, Coriolis force, drag, magnetic tension and magnetic buoyancy. We solve them assuming the disk to be adiabatic. We show that under a wide range of parameters describing the size and the field strength, as well as angular momentum distribution inside the disk, buoyant flux tubes, either released on the equatorial plane or at the outer edge of the disk, can gather in the chimney-like openings near the axis. This behavior makes the chimneys magnetically most active and could shed light on the origin and acceleration of cosmic jets, as well as the variabilities observed in Blazars.