|Possible two-step solar energy release mechanism due to turbulent magnetic reconnection|
|Fan QL(范全林); Feng XS(冯学尚); Xiang ZQ(向长青); 北京8701信箱
|Source Publication||Physics of Plasmas
|Keyword||Region Explosive Events
|Abstract||In this paper, a possible two-step solar magnetic energy release process attributed to turbulent magnetic reconnection is investigated by magnetohydrodynamic simulation for the purpose of accounting for the closely associated observational features including canceling magnetic features and different kinds of small-scale activities such as ultraviolet explosive events in the lower solar atmosphere. Numerical results based on realistic transition region physical parameters show that magnetic reconnections in a vertical turbulent current sheet consist of two stages, i.e., a first slow Sweet-Parker-like reconnection and a later rapid Petschek-like reconnection, where the latter fast reconnection phase seems a direct consequence of the initial slow reconnection phase when a critical state is reached. The formation of coherent plasmoid of various sizes and their coalescence play a central role in this complex nonlinear evolution. The "observed" values of the rate of cancellation flux as well as the approaching velocity of magnetic fragments of inverse polarity in present simulation are well consistent with the corresponding measurements in the latest observations. The difference between our turbulent magnetic reconnection two-step energy release model and other schematic two-step models is discussed and then possible application of present outcome to solar explosives is described.|
Fan QL,Feng XS,Xiang ZQ,et al. Possible two-step solar energy release mechanism due to turbulent magnetic reconnection[J]. Physics of Plasmas,2005,12(5):52901.
范全林,冯学尚,向长青,&北京8701信箱.(2005).Possible two-step solar energy release mechanism due to turbulent magnetic reconnection.Physics of Plasmas,12(5),52901.
范全林,et al."Possible two-step solar energy release mechanism due to turbulent magnetic reconnection".Physics of Plasmas 12.5(2005):52901.
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