Shock location and CME 3D reconstruction of a solar type II radio burst with LOFAR

TL;DR

This paper uses LOFAR radio imaging to analyze a solar coronal shock associated with a CME and type II radio burst, aiming to locate radio emission sources and understand band-splitting phenomena.

Contribution

It presents a novel 3D reconstruction of a CME-related shock and radio burst using LOFAR data, advancing understanding of shock locations and radio emission mechanisms.

Findings

Identified shock locations in the solar corona and interplanetary space.

Revealed the origin of band-splitting in type II radio bursts.

Demonstrated the effectiveness of LOFAR for coronal shock studies.

Abstract

Type II radio bursts are evidence of shocks in the solar atmosphere and inner heliosphere that emit radio waves ranging from sub-meter to kilometer lengths. These shocks may be associated with CMEs and reach speeds higher than the local magnetosonic speed. Radio imaging of decameter wavelengths (20-90 MHz) is now possible with LOFAR, opening a new radio window in which to study coronal shocks that leave the inner solar corona and enter the interplanetary medium and to understand their association with CMEs. To this end, we study a coronal shock associated with a CME and type II radio burst to determine the locations at which the radio emission is generated, and we investigate the origin of the band-splitting phenomenon.