相对论对等离子体重联中重联电流层的自调节
Self-regulation of the reconnecting current layer in relativistic pair plasma reconnection
摘要：
研究了相对论对等离子体重联中重联电流层的性质。我们发现，当电流层耗尽载流子时，电流层会自我调节其厚度，因此相对论重联保持了快速的重联速率。构建一个稳态Sweet-Parker模型，我们讨论了电流片膨胀的条件。基于能量的论点，我们得出结论，不可压缩的假设是无效的相对论Sweet-Parker重联。引导场的情况比反平行的情况更不可压缩，并且我们发现了更显着的电流片膨胀。
英文摘要：
We investigate properties of the reconnecting current layer in relativistic pair plasma reconnection. We found that the current layer self-regulates its thickness when the current layer runs out current carriers, and so relativistic reconnection retains a fast reconnection rate. Constructing a steady state Sweet-Parker model, we discuss conditions for the current sheet expansion. Based on the energy argument, we conclude that the incompressible assumption is invalid in relativistic Sweet-Parker reconnection. The guide field cases are more incompressible than the anti-parallel cases, and we find a more significant current sheet expansion.
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