We report on a case study of the complex type II radio burst of 2012 January 19 and its association with a white light coronal mass ejection (CME). The complexity can be described as the appearance of an additional type II burst component and strong intensity variation. The dynamic spectrum shows a pair of type II bursts with fundamental harmonic structures, one confined to decameter-hectometric (DH) wavelengths and the other extending to kilometric (km) wavelengths. By comparing the speeds obtained from white-light images with that speed of the shock inferred from the drift rate, we show that the source of the short-lived DH component is near the nose.
@article{arxiv.1605.09644,
title = {A Study of the 2012 January 19 Complex Type II Radio Burst Using Wind, SOHO, and STEREO Observations},
author = {T. B. Teklu and A. V. Gholap and N. Gopalswamy and S. Yashiro and P. Mäkelä and S. Akiyama and N. Thakur and H. Xie},
journal= {arXiv preprint arXiv:1605.09644},
year = {2016}
}
Comments
4 pages, 3 figures, contributed paper to be presented at the URSI Asia-Pacific Radio Science Conference in Seoul, August 21-25, 2016