期刊论文

中文

天文和天体物理学研究：英文版

1674-4527

1997

17

4

364-370

国家攀登计划项目 ; 国家自然科学基金

本校为其他机构

在不考虑粘滞律的条件下,讨论了弱磁化等温薄吸积盘的轴对称脉动不稳定性。结果表明，对轴对称扰动，盘内存在4种轴对称振荡模式。仅当B_z和B_γ同时存在时磁场才能影响这些振荡模式的不稳定性。B_z和B_γ对其中2种角频率较高的振荡模式（对应于ω_I)表现为非稳因素，而对其中2种角频率较低的振荡模式(对应于ω_(II)表现为致稳因素。。

In this paper, pulsational instabilities of oxisymmetry in weakly magnetized and isothermal accretion disks are investigated in detail without introducing viscosity law.It is shown that four modes of axisymmetric oscillations exist in the disks, arising from the axisymmetric perturbations. Only when both B z and B φ are present does the magnetic field affect the instabilities of these oscillation modes in the disks.B z and B φ act as destabilizing factors for the two oscillation modes with greater angular frequency (ω I )...