E-Print Archive

There are 4133 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
Determination of transport coefficients by coronal seismology of flare-induced slow-mode waves: Numerical parametric study of 1D loop model View all abstracts by submitter

Tongjiang Wang   Submitted: 2019-09-25 07:00

Recent studies of a flaring loop oscillation event on 2013 December 28 observed by the Atmospheric Imaging Assembly (AIA) of the Solar Dynamics Observatory (SDO) have revealed the suppression of thermal conduction and significant enhancement of compressive viscosity in hot (~10 MK) plasma. In this study we aim at developing a new coronal seismology method for determining the transport coefficients based on a parametric study of wave properties using a 1D nonlinear MHD loop model in combination with the linear theory. The simulations suggest a two-step scheme: we first determine the effective thermal conduction coefficient from the observed phase shift between temperature and density perturbations as this physical parameter is insensitive to the unknown viscosity; then from the loop model with the obtained thermal conduction coefficient, we determine the effective viscosity coefficient from the observed decay time using the parametric modeling. With this new seismology technique we are able to quantify the suppression of thermal conductivity by a factor of about 3 and the enhancement of viscosity coefficient by a factor of 10 in the studied flaring loop. Using the loop model with these refined transport coefficients, we study the excitation of slow magnetoacoustic waves by launching a flow pulse from one footpoint. The simulation can self-consistently produce the fundamental standing wave on a timescale in agreement with the observation.

Authors: Tongjiang Wang, Leon Ofman
Projects: SDO-AIA

Publication Status: Accepted by ApJ
Last Modified: 2019-09-25 13:33
Go to main E-Print page  On the Source Position and Duration of a Solar Type III Radio Burst Observed by LOFAR  The Eruption of Outer Spine-like Loops Leading to a Double-stage Circular-ribbon Flare  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
Lorentz Force Evolution Reveals the Energy Build-up Processes during Recurrent Eruptive Solar Flares
Measurement of the Height of the Chromospheric Network Emission from Solar Dynamics Observatory Images
Submillimeter radiation as the thermal component of the Neupert Effect
A Very Narrow RHESSI X-ray Flare on 25 September 2011
First Detection of Plasmoids from Breakout Reconnection on the Sun
A New Type of Jets in a Polar Limb of Solar Coronal Hole
First imaging spectroscopy observations of solar drift pair bursts
Round-Trip Slipping Magnetic Reconnection Observed in a Fan-Spine Jet
A global two-scale helicity proxy from pi-ambiguous solar magnetic fields
Multi-layered Kelvin-Helmholtz Instability in the Solar Corona
Magnetohydrodynamic Seismology of Quiet Solar Active Regions
Testing magnetohydrostatic extrapolation with radiative MHD simulation of a solar flare
Real-time solar image classification: assessing spectral, pixel-based approaches
Modelling Mg II During Solar Flares. II. Non-equilibrium Effects
Calibration of the Instrumental Crosstalk for the Near-IR Imaging Spectropolarimeter at the NST
On the Source Position and Duration of a Solar Type III Radio Burst Observed by LOFAR
Determination of transport coefficients by coronal seismology of flare-induced slow-mode waves: Numerical parametric study of 1D loop model
The Eruption of Outer Spine-like Loops Leading to a Double-stage Circular-ribbon Flare
Non-Stationary Fast-Driven Self-Organized Criticality in Solar Flares
Global Energetics of Solar Flares. IX. Refined Magnetic Modeling

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



© 2003 Solar Physics Group - Montana State University