E-Print Archive

There are 2680 abstracts currently viewable.
There is a problem with some abstracts that became corrupted following database issues. These will be restored as soon as possible.


Search:

Advanced Search
Options
Main Page Add New E-Print Submitter
Information
Feedback
News Help/FAQ About Preferences
Manage Key Phrase
Notification
Turbulent Coronal Heating Mechanisms: Coupling of Dynamics and Thermodynamics View all abstracts by submitter

Franco Rappazzo   Submitted: 2012-08-14 01:16

Context. Photospheric motions shuffle the footpoints of the strong axial magnetic field that threads coronal loops giving rise to turbulent nonlinear dynamics characterized by the continuous formation and dissipation of field-aligned current sheets where energy is deposited at small-scales and the heating occurs. Previous studies show that current sheets thickness is orders of magnitude smaller than current state of the art observational resolution (~700 km). Aim. In order to understand coronal heating and interpret correctly observations it is crucial to study the thermodynamics of such a system where energy is deposited at unresolved small-scales. Methods. Fully compressible three-dimensional magnetohydrodynamic simulations are carried out to understand the thermodynamics of coronal heating in the magnetically confined solar corona. Results. We show that temperature is highly structured at scales below observational resolution and nonhomogeneously distributed so that only a fraction of the coronal mass and volume gets heated at each time. Conclusions. This is a multi-thermal system where hotter and cooler plasma strands are found one next to the other also at sub-resolution scales and exhibit a temporal dynamics.

Authors: R. B. Dahlburg, G. Einaudi, A. F. Rappazzo, M. Velli
Projects: None

Publication Status: A&A (in press)
Last Modified: 2012-08-14 06:39
Go to main E-Print page  A Method for Data-Driven Simulations of Evolving Solar Active Regions  Three dimensional particle-in-cell simulation of particle acceleration by circularly polarised inertial Alfven waves in a transversely inhomogeneous plasma  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
Long-term temporal variations in the areas of sunspot groups
The Two Sources of Solar Energetic Particles
Dynamical Processes At the Vertical Current Sheet Behind an Erupting Flux Rope
Using Coronal Cells to Infer the Magnetic Field Structure and Chirality of Filament Channels
A Comparison of Solar Cycle Variations in the Equatorial Rotation Rates of the Sun's Subsurface, Surface, Corona, and Sunspot Groups
Magnetic Energy and Helicity Budgets in NOAA AR 11158
MHD Simulation of a Sigmoid Eruption of Active Region 11283
Element Abundances in Solar Energetic Particles and the Solar Corona
Preprocess the Photospheric Vector Magnetograms for NLFFF Extrapolation using a Potential Field Model and an Optimization Method
Extrapolation of the Solar Coronal Magnetic Field from SDO/HMI Magnetogram by a CESE--MHD--NLFFF Code
3-D nonlinear force-free field reconstruction of solar active region 11158 by direct boundary integral equation
Filament eruption on 2010 October 21 from three viewpoints
Estimating the properties of hard x-ray solar flares by constraining model parameters
Radio evidence for breakout reconnection in solar eruptive events
Study of the Recurring Dimming Region Detected at AR 11305 Using the Coronal Dimming Tracker (CoDiT)
The effect of initial conditions on the electromagnetic radiation generation in type III solar radio bursts
Non-linear and chaotic dynamo regimes
The Cooling of Coronal Plasmas. iv: Catastrophic Cooling of Loops
Measuring the Magnetic Field Strength of the Quiet Solar Corona Using ''EIT Waves''
ELECTRON AND PROTON ACCELERATION DURING THE FIRST GROUND LEVEL ENHANCEMENT EVENT OF SOLAR CYCLE 24

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