Numerical simulations of magnetic reconnection in the lower solar atmosphere

来源 :天文和天体物理学研究 | 被引量 : 0次 | 上传用户:dknight123lin
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Abstract Observations indicate that Ellerman bombs(EBs)and chromospheric microflares both occur in the lower solar atmosphere,and share many common features,such as temperature enhancements,accompanying jet-like mass motions,short lttetime,and so on.These strongly suggest that EBs and chromospheric microflares could both probably be induced by magnetic reconnectlon in the lower solar atmosphere.With gravity,ionization and radiation considered,we perform two-dimensional numerical simulations of magnetic reconnection in the lower solar atmosphere.The influence of different parameters,such as intensity of the magnetic field and anomalous resistivity,on the results are investigated.Our result de monstrates that the temperature increases are mainly due to the joule dissipation caused by magnetic reconnectionThe spectral profiles of EBs and chromospheric microflares are calculated with the non-LTE radiative transfer theory and compared with observations.It is found that the typical features of the two phenomena can be qualitatively reproduced.
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