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arXiv 2009.07679astro-ph.SRastro-ph.HEphysics.plasm-ph
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天体稠密简并双流体等离子体中的动力学快流产生/加速

Dynamical fast flow generation/acceleration in dense degenerate two-fluid plasmas of astrophysical objects

Ketevan Kotorashvili, Nino Revazashvili, Nana L. Shatashvili

摘要:

我们已经表明,由于统一的反向发电机/发电机机制的初始湍流(微尺度)的磁场/速度场的简并二流体天体物理系统中的快速宏观尺度等离子体流的产生/放大。这一过程与微观尺度的统一发电机是同时进行的,并相互补充。研究发现,宏观尺度流动的产生是磁流体耦合的必然结果,宏观尺度快速流动的产生与磁场的产生是同时发生的,两者成比例增长。由此产生的动态流加速是直接成比例的初始湍流磁(动能/磁)能量在简并的e-i(简并的e-p)天体物理等离子体的过程是非常敏感的系统和磁流体耦合的简并水平。在简并e-p等离子体中,对于实际的物理参数,总是存在这样一个色散关系的实解,它保证了强宏观尺度流/外流的形成;产生/加速的局部超Alfvénic流非常快,Alfvén马赫数为$> 10^3$,正如在各种天体物理外流中所观察到的那样

英文摘要:

We have shown the generation/amplification of fast macro-scale plasma flows in the degenerate two-fluid astrophysical systems with initial turbulent (micro--scale) magnetic/velocity fields due to the Unified Reverse Dynamo/Dynamo mechanism. This process is simultaneous with and complementary to the micro-scale unified dynamo. It is found that the generation of macro--scale flows is an essential consequence of the magneto-fluid coupling; the generation of macro--scale fast flows and magnetic fields are simultaneous, they grow proportionately. The resulting dynamical flow acceleration is directly proportional to the initial turbulent magnetic (kinetic/magnetic) energy in degenerate e-i (degenerate e-p) astrophysical plasma; the process is very sensitive to both the degeneracy level of the system and the magneto-fluid coupling. In case of degenerate e-p plasma, for realistic physical parameters, there always exists such a real solution of dispersion relation for which the formation of strong macro-scale flow/outflow is guaranteed; the generated/accelerated locally super-Alfvénic flows are extremely fast with Alfvén Mach number $> 10^3$ as observed in a variety of astrophysical outflows

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