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Using radio triangulation to understand the origin of two subsequent type II radio bursts by Jebaraj, Immanuel Christopher; Magdalenic, Jasmina; Podladchikova, Tatiana; Scolini, Camilla; Pomoell, Jens; Veronig, Astrid; Dissauer, Karin; Krupar, Vratislav; Kilpua, Emilia; Poedts, Stefaan is a scholarly article available to read on EtoBox.

What is Using radio triangulation to understand the origin of two subsequent type II radio bursts about?

Context: Eruptive events such as coronal mass ejections (CMEs) and flares accelerate particles and generate shock waves which can arrive at Earth and can disturb the magnetosphere. Understanding the association between CMEs and CME-driven shocks is therefore highly important for space weather studies. Aims: We present a study of the CME/flare event associated with two type II bursts observed on September 27, 2012. The aim of the study is to understand the relationship between the observed CME and the two distinct shock wave signatures. Methods: The multi-wavelength study of the eruptive event (CME/flare) was complemented with radio triangulation of the associated radio emission and modelling of the CME and the shock wave employing MHD simulations. Results: We found that, although temporal association between the type II bursts and the CME is good, the low-frequency type II(LF-type II) burst occurs significantly higher in the corona than the CME and its relationship to the CME is not straightforward. The analysis of the EIT wave (coronal bright front) shows the fastest wave component to be in the southeast quadrant of the Sun. This is also the quadrant in which the source positions

Author

Jebaraj, Immanuel Christopher; Magdalenic, Jasmina; Podladchikova, Tatiana; Scolini, Camilla; Pomoell, Jens; Veronig, Astrid; Dissauer, Karin; Krupar, Vratislav; Kilpua, Emilia; Poedts, Stefaan

Published

2020

Language

EN