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Comments on pulses of characteristic energy produced in solar flare detonations and its possible application to other astrophysical plasmas

Abstract

A qualitative discussion of physical conditions at neutral sheets was developed in an attempt to explain the repetitive pulsed energy-production mechanism, which has been suggested for solar flares. A characteristic energy per pulse appears to depend critically on the magnetic field strength and dipole length applied to a high temperature plasma, and seem to be regulated by discrete characteristic relative changes in the magnetic moment, following Syrovatskii's model. Discrete energy pulses are produced when neutral sheet thickness approaches to critical values, proportional to the characteristic relative changes in the magnetic moment. Repetition of pulses may occur in multi-sheet configurations as magnetically complex active centres, or at a single sheet where the total system energy change exceeds the critical conditions. The time-scale of the pulsed energy release may be explained by the tearing mode instability, and the repetition time-scale might be understood by the Sweet mechanism in limit conditions. The mechanism might have attractive applications in other high temperature astrophysical plasmas. An empirical relation is derived for pulses' energy prediction, in orders of magnitude, and some possible tests were suggested. An attempt was made to interpret soft ..gamma..-ray events of cosmic origin.
Authors:
Kaufmann, P [1] 
  1. Universidade Mackenzie, Sao Paulo (Brazil). Centro de Radio-Astronomia e Astrofisica
Publication Date:
Jun 01, 1977
Product Type:
Journal Article
Reference Number:
AIX-08-341986; EDB-78-040133
Resource Relation:
Journal Name: Astrophys. Space Sci.; (Netherlands); Journal Volume: 49:1
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; SOLAR FLARES; PULSES; ELECTRON DENSITY; ELECTRONS; MAGNETIC DIPOLES; MAGNETIC FIELDS; MAGNETIC MOMENTS; PLASMA; PLASMA SHEET; SUN; VELOCITY; DIPOLES; ELEMENTARY PARTICLES; FERMIONS; LEPTONS; MULTIPOLES; SOLAR ACTIVITY; STARS; 640104* - Astrophysics & Cosmology- Solar Phenomena
OSTI ID:
5236091
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: APSSB
Submitting Site:
INIS
Size:
Pages: 123-131
Announcement Date:

Citation Formats

Kaufmann, P. Comments on pulses of characteristic energy produced in solar flare detonations and its possible application to other astrophysical plasmas. Netherlands: N. p., 1977. Web. doi:10.1007/BF00647080.
Kaufmann, P. Comments on pulses of characteristic energy produced in solar flare detonations and its possible application to other astrophysical plasmas. Netherlands. doi:10.1007/BF00647080.
Kaufmann, P. 1977. "Comments on pulses of characteristic energy produced in solar flare detonations and its possible application to other astrophysical plasmas." Netherlands. doi:10.1007/BF00647080. https://www.osti.gov/servlets/purl/10.1007/BF00647080.
@misc{etde_5236091,
title = {Comments on pulses of characteristic energy produced in solar flare detonations and its possible application to other astrophysical plasmas}
author = {Kaufmann, P}
abstractNote = {A qualitative discussion of physical conditions at neutral sheets was developed in an attempt to explain the repetitive pulsed energy-production mechanism, which has been suggested for solar flares. A characteristic energy per pulse appears to depend critically on the magnetic field strength and dipole length applied to a high temperature plasma, and seem to be regulated by discrete characteristic relative changes in the magnetic moment, following Syrovatskii's model. Discrete energy pulses are produced when neutral sheet thickness approaches to critical values, proportional to the characteristic relative changes in the magnetic moment. Repetition of pulses may occur in multi-sheet configurations as magnetically complex active centres, or at a single sheet where the total system energy change exceeds the critical conditions. The time-scale of the pulsed energy release may be explained by the tearing mode instability, and the repetition time-scale might be understood by the Sweet mechanism in limit conditions. The mechanism might have attractive applications in other high temperature astrophysical plasmas. An empirical relation is derived for pulses' energy prediction, in orders of magnitude, and some possible tests were suggested. An attempt was made to interpret soft ..gamma..-ray events of cosmic origin.}
doi = {10.1007/BF00647080}
journal = {Astrophys. Space Sci.; (Netherlands)}
volume = {49:1}
journal type = {AC}
place = {Netherlands}
year = {1977}
month = {Jun}
}