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arXiv 1612.04092astro-ph.SR
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2001年12月26日太阳爆发事件对GLE63负责。III。CME、Shock Waves和高能粒子

The 26 December 2001 Solar Eruptive Event Responsible for GLE63. III. CME, Shock Waves, and Energetic Particles

V. V. Grechnev, V. I. Kiselev, A. M. Uralov, K. -L. Klein, A. A. Kochanov

摘要:

SOL 2001 -12-26中等太阳爆发事件(GOES重要性M7.1,微波高达4000 sfu,频率9.4 GHz,CME速度1446 km/s)产生了强的太阳高能粒子通量和地面宇宙线强度增强(GLE 63)。为了找到一个可能的原因,这一事件的高质子的结果,我们研究多波长图像和动态无线电频谱和定量协调的结果与对方。另一次喷发可能发生在同一活动区约半小时前的主要喷发。后者在脉冲阶段产生了两次类似爆炸波的冲击。这两个激波最终在径向方向上合并成一个激波,其轨迹可追溯到$25R_\odot$,作为扩张的CME天体前方的一个晕,这与风号航天器上的无线电和等离子体波研究(WAVES)实验记录的行星际II型事件一致。晕的形状和运动学表明,在这些距离的冲击波和弓形激波之间的中间制度。结果表明:(1)激波出现在耀斑上升过程中,对粒子的加速作用比通常认为的要早;(2)前一次爆发对粒子事件有放大作用,它拉伸了正在发展的CME上方的封闭结构,促进了CME的离地和耀斑加速粒子的逃逸,使CME的速度更快,前方的激波更强; iii)逃逸的耀斑加速粒子可以通过重新连接的通量绳,在那里他们被困,与一个大的日冕洞,另外促进; iv)第一次爆发提供了丰富的种子人口加速的尾随冲击波。

英文摘要:

The SOL2001-12-26 moderate solar eruptive event (GOES importance M7.1, microwaves up to 4000 sfu at 9.4 GHz, CME speed 1446 km/s) produced strong fluxes of solar energetic particles and ground-level enhancement of cosmic-ray intensity (GLE63). To find a possible reason for the atypically high proton outcome of this event, we study multi-wavelength images and dynamic radio spectra and quantitatively reconcile the findings with each other. An additional eruption probably occurred in the same active region about half an hour before the main eruption. The latter produced two blast-wave-like shocks during the impulsive phase. The two shock waves eventually merged around the radial direction into a single shock traced up to $25R_\odot$ as a halo ahead of the expanding CME body, in agreement with an interplanetary Type II event recorded by the Radio and Plasma Wave Investigation (WAVES) experiment on the Wind spacecraft. The shape and kinematics of the halo indicate an intermediate regime of the shock between the blast wave and bow shock at these distances. The results show that i) the shock wave appeared during the flare rise and could accelerate particles earlier than usually assumed; ii) the particle event could be amplified by the preceding eruption, which stretched closed structures above the developing CME, facilitated its lift-off and escape of flare-accelerated particles, enabled a higher CME speed and stronger shock ahead; iii) escape of flare-accelerated particles could be additionally facilitated by reconnection of the flux rope, where they were trapped, with a large coronal hole; iv) the first eruption supplied a rich seed population accelerated by a trailing shock wave.

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