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›› 2009, Vol. 26 ›› Issue (2): 258-267.DOI: 10.7523/j.issn.2095-6134.2009.2.016

• Research Articles • Previous Articles     Next Articles

Interaction between interplanetary shock and corotating high speed stream studied by a 3-D kinematic method

TONG Ya-Nan1,2, LIU Si-Qing1, LIU Fang-Hua1, GONG Jian-Cun1   

  1. 1. Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China;
    2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
  • Received:2008-03-03 Revised:2008-10-22 Online:2009-03-15

Abstract:

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.

Key words: 3-D kinematic model, interplanetary shock(IS), corotating high speed stream

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