On the possibility of radio emission from quasi-parallel and quasi-perpendicular propagation of shocks |
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Authors: | A Shanmugaraju S Umapathy |
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Institution: | (1) School of Physics, Madurai Kamaraj University, 625021 Madurai, India;(2) Radio Astronomy Centre, TIFR, 623001 Ooty, India |
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Abstract: | 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. A 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. |
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Keywords: | Radio emission shocks type II bursts |
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