E-Print Archive

There are 4115 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
Collisional relaxation of electrons in a warm plasma and accelerated nonthermal electron spectra in solar flares View all abstracts by submitter

Eduard Kontar   Submitted: 2015-07-08 16:08

Extending previous studies of nonthermal electron transport in solar flares which include the effects of collisional energy diffusion and thermalization of fast electrons, we present an analytic method to infer more accurate estimates of the accelerated electron spectrum in solar flares from observations of the hard X-ray spectrum. Unlike for the standard cold-target model, the spatial characteristics of the flaring region, especially the necessity to consider a finite volume of hot plasma in the source, need to be taken into account in order to correctly obtain the injected electron spectrum from the source-integrated electron flux spectrum (a quantity straightforwardly obtained from hard X-ray observations). We show that the effect of electron thermalization can be significant enough to nullify the need to introduce an ad hoc low-energy cutoff to the injected electron spectrum in order to keep the injected power in non-thermal electrons at a reasonable value. Rather the suppression of the inferred low-energy end of the injected spectrum compared to that deduced from a cold-target analysis allows the inference from hard X-ray observations of a more realistic energy in injected non-thermal electrons in solar flares.

Authors: Kontar, E. P.; Jeffrey, N. L. S.; Emslie, A. G.; Bian, N. H.
Projects: RHESSI

Publication Status: accepted to ApJ
Last Modified: 2015-07-10 20:38
Go to main E-Print page  Parallel Evolution of Quasi-separatrix Layers and Active Region Upflows  Calibration of Hinode/XRT for Coalignment  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
Non-Stationary Fast-Driven Self-Organized Criticality in Solar Flares
Global Energetics of Solar Flares. IX. Refined Magnetic Modeling
The Solar Orbiter SPICE instrument - An extreme UV imaging spectrometer
Anisotropic Radio-Wave Scattering and the Interpretation of Solar Radio Emission Observations
Large-amplitude quasi-periodic pulsations as evidence of impulsive heating in hot transient loop systems detected in the EUV with SDO/AIA
Dynamic Evolution of Current Sheets, Ideal Tearing, Plasmoid Formation and Generalized Fractal Reconnection Scaling Relations
Characteristics of solar wind rotation
A Study of Pre-Flare Solar Coronal Magnetic Fields: Magnetic Flux Ropes
New Solar Irradiance Measurements from the Miniature X-Ray Solar Spectrometer Cubesat
MinXSS-1 CubeSat On-Orbit Pointing and Power Performance: The First Flight of the Blue Canyon Technologies XACT 3-axis Attitude Determination and Control System
The Multi-instrument (EVE-RHESSI) DEM for Solar Flares, and Implications for Nonthermal Emission
A Statistical Study of Solar Filament Eruptions That Forms High-Speed Coronal Mass Ejections
Reversed dynamo at small scales and large magnetic Prandtl number
Three-dimensional Density Structure of a Solar Coronal Streamer Observed by SOHO/LASCO and STEREO/COR2 in Quadrature
Modelling Mg II During Solar Flares, I: Partial Frequency Redistribution, Opacity, and Coronal Irradiation
The Birth of a Jet-driven Twin CME and Its Deflection from Remote Magnetic Fields
On the Origin of Solar Torsional Oscillations and Extended Solar Cycle
What Sets the Magnetic Field Strength and Cycle Period in Solar-type Stars?
Stereoscopic Observations of an Erupting Mini-filament Driven Two-Sided-Loop Jet and the Applications for Diagnosing Filament Magnetic field
Dynamic Processes of the Moreton Wave on 2014 March 29

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