Thermal and Nonthermal Emission in Solar Flares

Details Thermal and Nonthermal Emission in Solar Flares Thermal and Nonthermal Emission in Solar Flares

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...611l..49w&link_type=abstract

The Astrophysical Journal, Volume 611, Issue 1, pp. L49-L52.

Astronomy and Astrophysics

Astronomy

16

Sun: Corona, Sun: Flares

Scientific paper

The observation that in many flares there is a linear correlation between the peak soft X-ray emission and the time-integrated nonthermal emission-the Neupert effect-indicates a strong link between particle acceleration and chromospheric evaporation. In this Letter we consider the hydrodynamic response of impulsively heated flare loops. We find that the peak soft X-ray flux should scale approximately as E1.75/V0.75L0.25, where E is the total input energy, V is the flare volume, and L is the loop length. This scaling is not consistent with the linear relationship implied by the Neupert effect unless there are additional correlations between the input energy and the other parameters of the flare.

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