000005742 001__ 5742
000005742 005__ 20220331165515.0
000005742 037__ $$aCTALK-2022-0048
000005742 100__ $$aJebaraj, I.C; 
000005742 245__ $$aConditions needed for generation of type II radio emission in the interplanetary space
000005742 260__ $$c2021
000005742 269__ $$c2021-04-24
000005742 520__ $$aEruptive events such as Coronal mass ejections (CMEs) and flares can generate shock waves. Tracking shock waves and predicting their arrival at Earth is a subject of numerous space weather studies. Ground-based radio observations allow us to locate shock waves in the low corona while space-based radio observations provide us opportunity to track shock waves in the inner heliosphere. We present a case study of CME/flare event, associated shock wave and its radio signature, i.e. type II radio burst. In order to analyze the shock wave parameters, we employed a robust paradigm. We reconstructed the shock wave in 3D using multi-viewpoint observations and modelled the evolution of its parameters using a 3D MHD background coronal model produced by the MAS (Magnetohydrodynamics Around a Sphere). To map regions on the shock wave surface, possibly associated with the electron acceleration, we combined 3D shock modelling results with the 3D source positions of the type II burst obtained using the radio triangulation technique. We localize the region of interest on the shock surface and examine the shock wave parameters to understand the relationship between the shock wave and the radio event. We analyzed the evolution of the upstream plasma characteristics and shock wave parameters during the full duration of the type II radio emission. First results indicate that shock wave geometry and its relationship with shock strength play an important role in the acceleration of electrons responsible for the generation of type II radio bursts.
000005742 594__ $$aNO
000005742 700__ $$aKouloumvakos, A; 
000005742 700__ $$aMagdalenic, J;
000005742 700__ $$aRouillard, A; 
000005742 700__ $$aKrupar, V;
000005742 700__ $$aPoedts, S.
000005742 773__ $$tEGU General Assembly 2021, held online
000005742 8560_ $$fimmanuel.jebaraj@observatoire.be
000005742 906__ $$aContributed
000005742 980__ $$aCTALKCONT