Volume 33 Issue 1
Jan.  2013
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Zhang Lei, Zheng Huinan, Liao Chijian. Numerical study of EUV wave on 13 February 2009[J]. Journal of Space Science, 2013, 33(1): 6-12. doi: 10.11728/cjss2013.01.006
Citation: Zhang Lei, Zheng Huinan, Liao Chijian. Numerical study of EUV wave on 13 February 2009[J]. Journal of Space Science, 2013, 33(1): 6-12. doi: 10.11728/cjss2013.01.006

Numerical study of EUV wave on 13 February 2009

doi: 10.11728/cjss2013.01.006
  • Received Date: 2011-08-09
  • Rev Recd Date: 2012-09-21
  • Publish Date: 2013-01-15
  • EUV wave is observed in the extreme ultraviolet spectrum as large-scale disturbances phenomenon, often accompanied by a coronal mass ejection. Besides, EUV wave is, when displayed in EUVI 195 Å difference image, a bright ring propagating outside with the subsequent spread of the dark zone. The disturbance can often cover the whole solar disk. The current study explores the CME-EUV wave event that occurred at 05:35UT on 13 February 2009, based on the STEREO satellite observations and the three-dimensional Magnetohydrodynamic (MHD) numerical simulation. We know this CME with 340km·s-1 front velocity and 60° angular width from the COR1/STEREO-A observations. Viewing in EUVI/STEREO-B 195Å running difference images, a bright toroidal wave front propagates outside from the active region, with dimming area following the bright wave front. The fitting velocity of EUV wave from the observation data is 247km·s-1. The numerical simulation shows that the (fast-mode) wave, with legible bright front and dimming structure, propagates in a speed of 245km·s-1. The simulation results turn out to be consistent with the satellite observations and confirm that EUV wave is a fast-mode MHD wave.

     

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