E-Print Archive

There are 4035 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
Turbulent cross-field transport of non-thermal electrons in coronal loops: theory and observations View all abstracts by submitter

Eduard Kontar   Submitted: 2012-02-01 15:17

Context. A fundamental problem in astrophysics is the interactionbetween magnetic turbulence and charged particles. It is now possibleto use Ramaty High Energy Solar Spectroscopic Imager (RHESSI)observations of hard X-rays (HXR) emitted by electrons to identify thepresence of turbulence and to estimate the magnitude of the magneticfield line diffusion coefficient at least in dense coronal flaringloops.
Aims: We discuss the various possible regimes of cross-field transportof non-thermal electrons resulting from broadband magnetic turbulencein coronal loops. The importance of the Kubo number K as a governingparameter is emphasized and results applicable in both the large andsmall Kubo number limits are collected.
Methods: Generic models, based on concepts and insights developed inthe statistical theory of transport, are applied to the coronal loopsand to the interpretation of hard X-ray imaging data in solar flares.The role of trapping effects, which become important in the non-linearregime of transport, is taken into account in the interpretation ofthe data.
Results: For this flaring solar loop, we constrain the ranges ofparallel and perpendicular correlation lengths of turbulent magneticfields and possible Kubo numbers. We show that a substantial amount ofmagnetic fluctuations with energy ~1% (or more) of the backgroundfield can be inferred from the measurements of the magnetic diffusioncoefficient inside thick-target coronal loops.

Authors: Bian, N. H.; Kontar, E. P.; MacKinnon, A. L.
Projects: RHESSI

Publication Status: published in Astronomy and Astrophysics
Last Modified: 2012-02-03 12:03
Go to main E-Print page  Characteristics of kinematics of a coronal mass ejection during the 2010 August 1 CME-CME interaction event  Prominence seismology  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
Why Does the Solar Corona Abnormally Rotate Faster Than the Photosphere?
Impacts On Proton Fluxes Observed During Different Interplanetary Conditions
Coronal Loop Seismology Using Standing Kink Oscillations With a Lookup Table
Data-Optimized Coronal Field Model: I. Proof of Concept
Coronal Bright Points
Difference of source regions between fast and slow coronal mass ejections
Invited Review: Signatures of Magnetic Flux Ropes in the Low Solar Atmosphere Observed in High Resolution
Do Kepler superflare stars really include slowly-rotating Sun-like stars ? - Results using APO 3.5m telescope spectroscopic observations and Gaia-DR2 data -
Magnetically Induced Current Piston for Generating Extreme-ultraviolet Fronts in the Solar Corona
Magnetic Field Dynamics and Varying Plasma Emission in Large-scale Coronal Loops
Nonlinear Evolution of Ion Kinetic Instabilities in the Solar Wind
What determines the X-ray intensity and duration of a solar flare?
Fast Magnetoacoustic Wave Trains with Time-dependent Drivers
Three-dimensional reconstruction of CME-driven shock-streamer interaction from radio observations: a different take on the diagnostics of coronal magnetic fields
The soft X-ray spectrometer polarimeter SolpeX
Variable emission mechanism of a Type IV radio burst
Inference of magnetic field strength and density from damped transverse coronal waves
Frequency-Distance Structure of Solar Radio Sources Observed by LOFAR
The birth of a coronal mass ejection
Properties of slow magnetoacoustic oscillations of solar coronal loops by multi-instrumental observations

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