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首页> 外文期刊>Chinese Astronomy and Astrophysics >Evolutionary characteristics of energetic electrons accelerated by electric fields in the process of magnetic reconnection in solar active regions
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Evolutionary characteristics of energetic electrons accelerated by electric fields in the process of magnetic reconnection in solar active regions

机译：太阳活动区磁重联过程中电场加速的高能电子的演化特征

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摘要

When a filament in an active region quickly ascends, the underlying current sheets reconnect with one another and produce strong electric fields, which may accelerate electrons. On the basis of this physical process and by means of solving the Fokker-Planck equation, which includes Coulomb collisions and ion-acoustic turbulent scattering, the evolutionary characteristics of electron distribution function have been obtained. The results of calculations show that (1) When the intensity of electric field is 1-10 V cm~(-1), then in 10~(-5)-10~(-6)s electrons may be accelerated to the order of 0.1-1 MeV; (2) The accelerated electrons approximately exhibit power-law distribution and its spectral index basically coincides with that inferred from the microwaves and hard X-rays of flares during the impulsive phase.
机译：当活动区域中的灯丝快速上升时，下面的电流板会彼此重新连接并产生强电场，这可能会加速电子。在此物理过程的基础上，通过求解包括库仑碰撞和离子声湍流散射在内的Fokker-Planck方程，获得了电子分布函数的演化特征。计算结果表明：（1）当电场强度为1-10 V cm〜（-1）时，在10〜（-5）-10〜（-6）s时电子可以加速到0.1-1 MeV; （2）加速电子大致表现出幂律分布，其光谱指数基本上与在脉冲相期间从微波和火炬的硬X射线推断的光谱指数一致。

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