E-Print Archive

There are 4488 abstracts currently viewable.


Search:

Advanced Search
Options
Main Page Add New E-Print Submitter
Information
Feedback
News Help/FAQ About Preferences
Manage Key Phrase
Notification
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 Nanšay 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, StÚphane 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  First Frequency-Time-Resolved Imaging Spectroscopy Observations of Solar Radio Spikes  The Formation and Lifetime of Outflows in a Solar Active Region  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

Key
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
The relativistic solar particle event on 28 October 2021: Evidence of particle acceleration within and escape from the solar corona
Statistical Analysis of Stellar Flares from the First Three Years of TESS Observations
Interface Region Imaging Spectrograph (IRIS) Observations of the Fractal Dimension in the Solar Atmosphere
Clusters of Solar Radio Spikes Modulated by Quasi-Periodic Pulsations in a Confined Flare
Dynamic Property and Magnetic Nonpotentiality of Two Types of Confined Solar Flares
Terrestrial volcanic eruptions and their possible links with solar activity
Transition to turbulence in nonuniform coronal loops driven by torsional Alfvén waves. II. Extended analysis and effect of magnetic twist
Bayesian approach for modeling solar active region global magnetic parameters
Where is the base of the Transition Region? Evidence from TRACE, SDO, IRIS and ALMA observations
The Spectrometer Telescope for Imaging X-rays (STIX) on Solar Orbiter
Detection of spicules termed Rapid Blue-shifted Excursions as seen in the chromosphere via Hα and the transition region via Si iv 1394 ┼ line emission
Grid-based imaging in X-rays and gamma-rays with high spatial resolution
It Takes a Village (Invited memoir)
Maximal growth rate of the ascending phase of a sunspot cycle for predicting its amplitude
Starspots Modelling and Flare Analysis on Selected MV Stars
Doubling of minute-long Quasi-Periodic Pulsations from super-flares on a low mass star
Geometric Assumptions in Hydrodynamic Modeling of Coronal and Flaring Loops
Sun-as-a-star Analysis of Hα Spectra of a Solar Flare Observed by SMART/SDDI: Time Evolution of Red Asymmetry and Line Broadening
Searching for quasi-periodic oscillations in astrophysical transients using Gaussian processes
Analysis of the Evolution of a Multi-Ribbon Flare and Failed Filament Eruption

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