E-Print Archive

There are 4423 abstracts currently viewable.


Advanced Search
Main Page Add New E-Print Submitter
News Help/FAQ About Preferences
Manage Key Phrase
Observations of shock propagation through turbulent plasma in the solar corona View all abstracts by submitter

Eoin Carley   Submitted: 2021-08-16 03:27

Eruptive activity in the solar corona can often lead to the propagation of shock waves. In the radio domain the primary signature of such shocks are type II radio bursts, observed in dynamic spectra as bands of emission slowly drifting towards lower frequencies over time. These radio bursts can sometimes have inhomogeneous and fragmented fine structure, but the cause of this fine structure is currently unclear. Here we observe a type II radio burst on 2019-March-20th using the New Extension in Nançay Upgrading LOFAR (NenuFAR), a radio interferometer observing between 10-85 MHz. We show that the distribution of size-scales of density perturbations associated with the type II fine structure follows a power law with a spectral index in the range of α -1.7 to -2.0, which closely matches the value of -5/3 expected of fully developed turbulence. We determine this turbulence to be upstream of the shock, in background coronal plasma at a heliocentric distance of ~2 Rsun. The observed inertial size-scales of the turbulent density inhomogeneities range from ~62 Mm to ~209 km. This shows that type II fine structure and fragmentation can be due to shock propagation through an inhomogeneous and turbulent coronal plasma, and we discuss the implications of this on electron acceleration in the coronal shock.

Authors: Eoin P. Carley, Baptiste Cecconi, Hamish A. Reid, Carine Briand, Sasikumar Raja, Sophie Masson, Vladimir V. Dorovskyy, Caterina Tiburzi, Nicole Vilmer, Pietro Zucca, Philippe Zarka, Michel Tagger, Jean-Mathias Griessmeier, Stéphane Corbel, Gilles Theureau, Alan Loh, Julien Girard
Projects: None

Publication Status: In press
Last Modified: 2021-08-16 13:53
Go to main E-Print page  Magnetic Flux and Magnetic Non-potentiality of Active Regions in Eruptive and Confined Solar Flares  The Formation and Lifetime of Outflows in a Solar Active Region  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

Go to main E-Print pageGo to main E-Print page.
Previous AbstractPrevious Abstract.
Next AbstractNext Abstract.
Download PreprintDownload Preprint.
Submitter's HomepageSubmitters Homepage.
Edit EntryEdit Entry.
View All Abstracts By SubmitterView all abstracts by submitter.
Delete AbstractDelete abstract.

Latest Entries
Thomson scattering in the lower corona in the presence of sunspots
The Spatial and Temporal Variations of Turbulence in a Solar Flare
Investigations of Sizes and Dynamical Motions of Solar Photospheric Granules by a Novel Granular Segmenting Algorithm
Millennial oscillations of solar irradiance and magnetic field at Earth in 600-2600
Plasma turbulence generated in 3D current sheet with magnetic islands
Simultaneous ALMA-Hinode-IRIS observations on footpoint signatures of a soft X-ray loop-like microflare
Multiple electron acceleration instances during a series of solar
CME-Driven and Flare-Ignited Fast Magnetosonic Waves Successively Detected in a Solar Eruption
Sympathetic Filament Eruptions within a Fan-spine Magnetic System
Formation of Magnetic Flux Rope during Solar Eruption. I. Evolution of Toroidal Flux and Reconnection Flux
Stereoscopy of extreme UV quiet Sun brightenings observed by Solar Orbiter/EUI
Solar Flare Effects on the Earth’s Lower Ionosphere
Measurements of Photospheric and Chromospheric Magnetic Field Structures Associated with Chromospheric Heating over a Solar Plage Region
Probing Current Sheet Instabilities from Flare Ribbon Dynamics
Global Nature of Solar Coronal Shock Waves shown by Inconsistency between EUV Waves and Type II Radio Bursts
Solar surges related to UV bursts: Characterization through k-means, inversions and density diagnostics
A revised cone model and its application to non-radial prominence eruptions
Zonal harmonics of solar magnetic field for solar cycle forecast
TESS observations of flares and quasi-periodic pulsations from low mass stars and potential impact on exoplanets
Kink oscillations of coronal loops

Related Pages
MSU Solar Physics.
Max Millennium Science Mail Archive.
Max Millennium Message of the Day Mail Archive.
Max Millennium Flare Catalog

Archive Maintainer
Alisdair Davey

© 2000-2020 Solar Physics Group - Montana State University