Ni Lei, Ji Hantao, Murphy Nicholas A, Jara-Almonte Jonathan
Yunnan Observatories, Chinese Academy of Sciences, PO Box 110, Kunming, Yunnan 650216, People's Republic of China.
Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China.
Proc Math Phys Eng Sci. 2020 Apr;476(2236):20190867. doi: 10.1098/rspa.2019.0867. Epub 2020 Apr 22.
Magnetic reconnection has been intensively studied in fully ionized plasmas. However, plasmas are often partially ionized in astrophysical environments. The interactions between the neutral particles and ionized plasmas might strongly affect the reconnection mechanisms. We review magnetic reconnection in partially ionized plasmas in different environments from theoretical, numerical, observational and experimental points of view. We focus on mechanisms which make magnetic reconnection fast enough to compare with observations, especially on the reconnection events in the low solar atmosphere. The heating mechanisms and the related observational evidence of the reconnection process in the partially ionized low solar atmosphere are also discussed. We describe magnetic reconnection in weakly ionized astrophysical environments, including the interstellar medium and protostellar discs. We present recent achievements about fast reconnection in laboratory experiments for partially ionized plasmas.
磁重联已在完全电离的等离子体中得到深入研究。然而，在天体物理环境中，等离子体常常是部分电离的。中性粒子与电离等离子体之间的相互作用可能会强烈影响重联机制。我们从理论、数值、观测和实验的角度综述了不同环境下部分电离等离子体中的磁重联。我们关注那些能使磁重联速度快到足以与观测结果相比较的机制，尤其关注低日冕中的重联事件。还讨论了部分电离的低日冕中重联过程的加热机制及相关观测证据。我们描述了弱电离天体物理环境中的磁重联，包括星际介质和原恒星盘。我们介绍了部分电离等离子体实验室实验中快速重联的最新成果。
