Using radio triangulation to understand the origin of two subsequent type II radio bursts

Abstract

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 of the LF-type II were found to be located, probably resulting from the interaction between the shock wave and a streamer. Conclusions: The relationship between the CME/flare event and the shock wave signatures is discussed using the temporal association,as well as the spatial information of the radio emission. Further, we discuss the importance and possible effects of the frequently non-radial propagation of the shock wave.

16 pages, 14 figures, accepted for publication in Astronomy and Astrophysics

References in corpus (21)

• A Review of Solar Type III Radio Bursts
• Observations of an extreme storm in interplanetary space caused by successive coronal mass ejections
• Coherent Emission Mechanisms in Astrophysical Plasmas
• High cadence observations of a global coronal wave by EUVI/STEREO
• CME-CME Interactions as Sources of CME Geo-effectiveness: The Formation of the Complex Ejecta and Intense Geomagnetic Storm in Early September 2017
• The formation heights of coronal shocks from 2D density and Alfvén speed maps
• Observation-based modelling of magnetised Coronal Mass Ejections with EUHFORIA
• Understanding the Physical Nature of Coronal "EIT Waves"
• Interplanetary Propagation Behavior of the Fast Coronal Mass Ejection from 23 July 2012
• Density Fluctuations in the Solar Wind Based on Type III Radio Bursts Observed by Parker Solar Probe
• Three-dimensional reconstruction of CME-driven shock-streamer interaction from radio and EUV observations: a different take on the diagnostics of coronal magnetic fields
• The Low-High-Low Trend of Type III Radio Burst Starting Frequencies and Solar Flare Hard X-rays
• Spectroscopy and Differential Emission Measure diagnostics of a coronal dimming associated with a fast halo CME
• Radio Diagnostics of Electron Acceleration Sites During the Eruption of a Flux Rope in the Solar Corona
• Sunspot number second differences as a precursor of the following 11-year sunspot cycle
• Multipoint study of successive coronal mass ejections driving moderate disturbances at 1 AU
• 3D reconstructions of EUV wave front heights and their influence on wave kinematics
• Determination of Electromagnetic Source Direction as an Eigenvalue Problem
• Shock-related radio emission during coronal mass ejection lift-off?
• STEREO-Wind Radio Positioning of an Unusually Slow Drifting Event
• Forward Modeling of the Type III Radio Burst Exciter

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