Constraining the onset height of coronal mass ejection driven shocks using near-Sun observations in visible and radio wavelengths

C. Kathiravan, V. Muthupriyal, R. Ramesh

One of the debated issues about the onset of the type II radio bursts near the Sun is the heliocentric distance ($r$) at which the associated magnetohydrodynamic (MHD) shocks are f…