Resistive Magnetohydrodynamics of Jet Formation and Magnetically Driven Accretion
Resistive Magnetohydrodynamics of Jet Formation and Magnetically Driven Accretion
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射流形成和磁驱动吸积的电阻磁流体动力学
DOI：
10.1093/pasj/52.6.1109
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发表时间：
2000
影响因子：
2.3
通讯作者：
T. Kuwabara
中科院分区：
文献类型：
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作者：
T. Kuwabara
我们进行了2.5维的电阻磁流体动力学模拟研究磁扩散率的磁驱动质量吸积和喷流形成的影响。我们发现：（1）当归一化磁扩散率较小时，质量吸积和喷流的形成是间歇性的;（2）当扩散率为中等时，系统向准稳态演化;（3）当扩散率较大时，吸积/质量流出率随扩散率减小而趋于0.这些模拟结果表明，磁制动提供了一个质量吸积率，这是足以解释活动星系核的活动。
We carried out 2.5-dimensional resistive magnetohydrodynamic simulations to study the effects of magnetic diffusivity on magnetically driven mass accretion and jet formation. We found that (1) when the normalized magnetic diffusivity, is small, mass accretion and jet formation take place intermittently; (2) when diffusivity is middle, the system evolves toward a quasi-steady state; and the system evolves toward a quasi-steady state; and (3) when diffusivity is large, the accretion/mass outflow rate decreases with diffusivity and approaches 0. The results of these simulations indicate magnetic braking provide a mass accretion rate which is sufficient to explain the activity of AGNs.