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Magnetic reconnection in large-scale cosmic plasmas

机译:大规模宇宙等离子体中的磁重连接

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摘要

X-ray emitting hot plasmas of a temperature 2-12 keV, associated with galaxy clusters, constitute the most dominant form of baryons in the universe. The plasma is thought to be magnetized at least to 0.1-1 nT, although the β value is relatively high at 10-100. The plasma is confined by gravity of each cluster in a stable manner, but the member galaxies are moving through it with an approximately transonic speed. Therefore, the plasma must be in a magnetohydrodynamically turbulent condition, where frequent magnetic reconnection is expected to take place. Mainly based on observations with the ASCA X-ray Observatory, evidence for such magnetic reconnection is accumulating.
机译:与星系团相关的温度为2-12 keV的X射线发射热等离子体构成了宇宙中重子的最主要形式。尽管β值在10-100之间相对较高,但认为等离子体至少被磁化至0.1-1 nT。等离子体受每个团簇的重力稳定地限制,但成员星系以近似跨音速的速度通过它。因此,等离子体必须处于磁流体动力学湍流状态,在这种情况下,预计会发生频繁的磁连接。主要基于对ASCA X射线天文台的观察,这种磁性重新连接的证据正在积累。

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