A solar type II radio burst from CME-coronal ray interaction:   simultaneous radio and EUV imaging
  Simultaneous radio and extreme ultraviolet (EUV)/white-light imaging data are examined for a solar type II radio burst occurring on 2010 March 18 to deduce its source location. Using a bow-shock model, we reconstruct the 3-dimensional EUV wave front (presumably the type-II emitting shock) based on the imaging data of the two STEREO spacecraft. It is then combined with the Nan\c{c}ay radio imaging data to infer the 3-dimensional position of the type II source. It is found that the type II source coincides with the interface between the CME EUV wave front and a nearby coronal ray structure, providing evidence that the type II emission is physically related to the CME-ray interaction. This result, consistent with those of previous studies, is based on simultaneous radio and EUV imaging data for the first time. 
Yao Chen, Guohui Du, Li Feng, Shiwei Feng, Xiangliang Kong, Fan Guo,   Bing Wang, and Gang Li
physics.space-ph astro-ph.SR