No-z模型:吸积盘的结果和前景

E. Mikhailov, M. V. Pashentsevay
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引用次数: 0

摘要

吸积盘围绕着不同的致密天体,如黑洞、中子星和白矮星。它们也位于变星系统中,靠近星系中心。磁场在吸积盘的演化和流体动力学中起着重要的作用:例如,它们可以描述角动量的转变等过程。有不同的方法来解释磁场,但最有趣的是与发电机产生有关。对于盘,采用已发展的星系盘的无-$z$近似解动力学方程是很有用的。它考虑到圆盘很薄,我们只能解两个平面分量的方程。这里我们描述了距离圆盘中心不同距离时磁场的时间依赖性。我们还将结果与考虑更复杂场结构的其他方法进行了比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
No-z model: results and perspectives for accretion discs
Accretion discs surround different compact astrophysical objects such as black holes, neutron stars and white dwarfs. Also they are situated in systems of variable stars and near the galaxy center. Magnetic fields play an important role in evolution and hydrodynamics of the accretion discs: for example, they can describe such processes as the transition of the angular momentum. There are different approaches to explain the magnetic fields, but most interesting of them are connected with dynamo generation. As for disc, it is quite useful to take no-$z$ approximation which has been developed for galactic discs to solve the dynamo equations. It takes into account that the disc is quite thin, and we can solve the equations only for two plane components of the field. Here we describe the time dependence of the magnetic field for different distances from the center of the disc. Also we compare the results with another approaches which take into account more complicated field structure.
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