The distribution of flare parameters and implications for coronal heating

Details The distribution of flare parameters and implications for coronal heating The distribution of flare parameters and implications for coronal heating

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...412..401l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 412, no. 1, p. 401-409.

Astronomy and Astrophysics

Astrophysics

54

Atmospheric Heating, Solar Corona, Solar Flares, Solar X-Rays, Bremsstrahlung, Electron Acceleration, International Sun Earth Explorer 3, Solar Spectra

Scientific paper

Assuming that solar hard X-ray flares are caused by bremsstrahlung from a distribution of accelerated electrons impinging on a thick target, we determine the relationship between the total flare energy released in the corona and observable flare parameters. It is shown that for the more numerous smaller flares to be energetically more important than larger ones, there must be an anticorrelation between observed flux and one or more of the photon spectral index, the total flare duration, the ratio of the total energy that goes into heating the corona to the energy that goes into acceleration of electrons, and the reciprocal of the low-energy cutoff of the accelerated electron spectrum. Using a new statistical test which properly takes account of data truncation due to observational selection effects, we find that neither spectral index nor duration show an anticorrelation with flux in ISEE 3/ICE hard X-ray data. Using a nonparametric method, we obtain single distributions of peak flux, spectral index, duration, and fluence, corrected for selection biases. The functional forms of these distributions do not support coronal heating by numerous small flares without very specific behavior by yet unobserved parameters.

Affiliated with

Also associated with

No associations

Rating

The distribution of flare parameters and implications for coronal heating does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The distribution of flare parameters and implications for coronal heating, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The distribution of flare parameters and implications for coronal heating will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1069798