Understanding CME and associated shock in the solar corona by merging multi wavelengths observation

Abstract

Using multi-wavelength imaging observations, in EUV, white light and radio, and radio spectral data over a large frequency range, we analyzed the triggering and development of a complex eruptive event. This one includes two components, an eruptive jet and a CME which interact during more than 30 min, and can be considered as physically linked. This was an unusual event. The jet is generated above a typical complex magnetic configuration which has been investigated in many former studies related to the build-up of eruptive jets; this configuration includes fan-field lines originating from a corona null point above a parasitic polarity, which is embedded in one polarity region of large Active Region (AR). The initiation and development of the CME, observed first in EUV, does not show usual signatures. In this case, the eruptive jet is the main actor of this event. The CME appears first as a simple loop system which becomes destabilized by magnetic reconnection between the outer part of the jet and the ambient medium. The progression of the CME is closely associated with the occurrence of two successive types II bursts from distinct origin. An important part of this study is the first radio type II burst for which the joint spectral and imaging observations allowed: i) to follow, step by step, the evolution of the spectrum and of the trajectory of the radio burst, in relationship with the CME evolution; ii) to obtain, without introducing an electronic density model, the B-field and the Alfven speed.

arXiv comment17 pages, 13 figures

References in corpus (13)

• A Model for Solar Coronal Mass Ejections
• Observing Flux Rope Formation During the Impulsive Phase of a Solar Eruption
• Direct Detection of a CME-Associated Shock in LASCO White Light Images
• How Many CMEs Have Flux Ropes? Deciphering the Signatures of Shocks, Flux Ropes, and Prominences in Coronagraph Observations of CMEs
• First observations of a dome-shaped large-scale coronal EUV wave
• Large-scale Bright Fronts in the Solar Corona: A Review of "EIT waves"
• The formation heights of coronal shocks from 2D density and Alfvén speed maps
• Investigating Two Successive Flux Rope Eruptions In A Solar Active Region
• Toward understanding the early stages of an impulsively accelerated coronal mass ejection
• Spatially resolved observations of a split-band coronal type-II radio burst
• On the relationship of shock waves to flares and coronal mass ejections
• A broken solar type II radio burst induced by a coronal shock propagating across the streamer boundary
• CME liftoff with high-frequency fragmented type II burst emission

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• Evolution of the Alfvén Mach number associated with a coronal mass ejection shock
• Radio Spectroscopic Imaging of a Solar Flare Termination Shock: Split-Band Feature as Evidence for Shock Compression
• Radio Diagnostics of Electron Acceleration Sites During the Eruption of a Flux Rope in the Solar Corona
• An observational revisit of band-split solar type-II radio bursts
• Investigating the Conditions of the Formation of a Type II Radio Burst on 2014 January 8
• Imaging-spectroscopy of a band-split type II solar radio burst with the Murchison Widefield Array
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• Decameter Stationary Type IV Burst in Imaging Observations on the 6th of September 2014
• Imaging and Spectral Observations of a Type-II Radio Burst Revealing the Section of the CME-Driven Shock that Accelerates Electrons
• Quantifying the Magnetic Structure of a Coronal Shock Producing a Type II Radio Burst
• Comprehensive Characterization of Solar Eruptions With Remote and In-Situ Observations, and Modeling: The Major Solar Events on 4 November 2015
• New results on the direct observations of thermal radio emission from a solar coronal mass ejection
• A Study of a long duration B9 flare-CME event and associated piston-driven shock
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• Type II radio bursts and space weather phenomena: A statistical study
• Multiple shocks generated by the 2024 May 14 coronal mass ejection
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