NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Frequency distributions and correlations of solar X-ray flare parametersFrequency distributions of flare parameters are determined from over 12,000 solar flares. The flare duration, the peak counting rate, the peak hard X-ray flux, the total energy in electrons, and the peak energy flux in electrons are among the parameters studied. Linear regression fits, as well as the slopes of the frequency distributions, are used to determine the correlations between these parameters. The relationship between the variations of the frequency distributions and the solar activity cycle is also investigated. Theoretical models for the frequency distribution of flare parameters are dependent on the probability of flaring and the temporal evolution of the flare energy build-up. The results of this study are consistent with stochastic flaring and exponential energy build-up. The average build-up time constant is found to be 0.5 times the mean time between flares.
Document ID
19930052624
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Crosby, Norma B.
(NASA Goddard Space Flight Center Greenbelt, MD; Catholic Univ. of America, Washington, United States)
Aschwanden, Markus J.
(NASA Goddard Space Flight Center Greenbelt, MD; Maryland Univ., College Park, United States)
Dennis, Brian R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
February 1, 1993
Publication Information
Publication: Solar Physics
Volume: 143
Issue: 2
ISSN: 0038-0938
Subject Category
Solar Physics
Accession Number
93A36621
Funding Number(s)
CONTRACT_GRANT: NAS5-30442
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available