具有类偶极磁场的厚吸积盘模型

THE THICK ACCRETION DISK MODEL WITH A QUASI-DIPOLE MAGNETIC FIELD

本文从磁流体力学基本方程组出发,讨论了具有类偶极磁场的厚吸积盘模型。其结果表明:引入这种磁场位形后,会影响盘的位形、光度和吸积率。对光度的影响是通过改变盘的位形实现的,它使盘变厚,会在厚盘的内区形成更窄更陡的漏斗状结构,这对解释类星体的高度准直性的喷流更为有利;并且还预言不对称喷流或单边喷流的存在。

From the basic magnetohydrodynamics equations, the accretion disk model with a quasi-dipole magnetic field is discussed in this paper. The result shows that the introduction of the quasi-dipole magnetic field influences the configuration, luminosity and the accretion ratio of the disk. The influence on the luminosity is realized by means of changing the configuration of the disk, and makes the disk thicker. The funnel structure, which is natrower and more gradient, is formed by the disk configuration change. This structure is more appropriate to explain the high collimated jet of quasars, and to predict the existence of the one-sided jet and the asymmetric jet.