收稿日期: 2008-03-03
修回日期: 2008-10-22
网络出版日期: 2009-03-15
基金资助
国家973计划(G2006CB806300)资助
Interaction between interplanetary shock and corotating high speed stream studied by a 3-D kinematic method
Received date: 2008-03-03
Revised date: 2008-10-22
Online published: 2009-03-15
利用三维运动学模型模拟研究行星际激波与共转高速流(CHSS)的相互作用。通过改变模式输入条件中耀斑的强度及位置,研究相互作用对CHSS到达地球时间的影响,以及对激波的传播和激波形态的影响。模拟结果表明:(1)行星际激波与CHSS相互作用对彼此到达地球时间都有影响;(2)有激波比没有激波条件下的CHSS到达地球时间要早,且CHSS到达地球时间与驱动激波的耀斑的强度以及扰动源区的位置有关,耀斑的强度越大、扰动源区与CHSS前的电流片的经度距离越近,则CHSS到达地球时间也越早;(3)激波在以CHSS为背景的太阳风中传播比在没有CHSS的均匀背景场中传播得快,但激波与CHSS的相互作用对激波到达地球时间的影响远没有对CHSS到达地球时间的影响大;(4)当耀斑位于CHSS前电流片的东边时,耀斑驱动的激波与CHSS相互作用可能会使激波形态发生改变,呈双峰结构。
佟亚男 , 刘四清 , 刘方华 , 龚建村 . 用三维运动学模型研究行星际激波与共转高速流的相互作用[J]. 中国科学院大学学报, 2009 , 26(2) : 258 -267 . DOI: 10.7523/j.issn.2095-6134.2009.2.016
The interaction between interplanetary shock (IS) and corotating high speed stream (CHSS) was investigated in this paper using a 3-D kinematic method (HAF model). By changing the input conditions, such as the intensity and the location of flares, the influence of the interaction on the arrival time of CHSS was analyzed at first. Then the shock propagation effected by the interaction was studied. The simulation results showed that: (1) The interaction between IS and CHSS can influence their arrival time; (2) CHSS compressed by IS arrived earlier. Moreover, the arrival time of CHSS was associated with the intensity and location of IS's solar sources, flares. With the longitude distance between the flare and the current sheet in front of CHSS decreasing, and the flare intensity getting stronger, CHSS arrived earlier; (3) The propagation of IS under the background of CHSS was faster. But the interaction made much less influence on IS comparing with CHSS; (4) When a flare was situated at the eastern of the current sheet in front of CHSS, the shape of IS driven by the flare maybe changed and displayed two peaks structure.
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