On the Possibility of Radio Emission from Quasi-parallel and Quasi-perpendicular Propagation of Shocks

Journal of astrophysics and astronomy

A. Shanmugaraju1¹  S. Umapathy¹ 

[1] School of Physics, Madurai Kamaraj University, Madurai - 625021, India$$

关键词: Radio emission;    shocks;    type II bursts.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

A set of 21 solar type II radio bursts observed using Hiraiso radio spectrograph have been analysed to study the direction of propagation of coronal shocks. Α simple analysis is carried out to find the approximate angle between the shock normal and magnetic field by solving the Rankine-Hugoniot MHD relation with assumption of Alfven speed and plasma beta. From this analysis, it is suggested that both quasi-parallel shocks (favourable) and quasi-perpendicular shocks can generate type II bursts depending upon the circumstances of the corona.

【 授权许可】

Unknown