Signatures of High Energy Particle Beams in the Chromospheric Events Before the 25 July 2004 Flare Onset

Details Signatures of High Energy Particle Beams in the Chromospheric Events Before the 25 July 2004 Flare Onset Signatures of High Energy Particle Beams in the Chromospheric Events Before the 25 July 2004 Flare Onset

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...1e..47k&link_type=abstract

Cosmic Particle Acceleration, 26th meeting of the IAU, Joint Discussion 1, 16-17 August, 2006, Prague, Czech Republic, JD01, #47

Computer Science

Scientific paper

A role of particle beams is studied in the origin and evolution of small-scale chromospheric events appeared before the main phase onset at 13:37 UT of the July 25, 2004 flare. The main goal of our investigation was to detect possible locations of energy release and to trace the processes of energy transport by high-energy particles to the chromosphere. Based on the plasma and beam parameters deduced from hard X-ray flux and UV data, 1D hydrodynamic responses of the atmosphere is calculated and used for a full non-LTE simulation of hydrogen H-alpha line emission taking into account thermal and non-thermal processes. Theoretical line profiles are compared with the observed dynamics of H-alpha intensity. A comparison is carried out of the high energy particle parameters deduced from chromospheric emission, hard X-ray flux and UV data that allows us to find a possible scenario of the event evolution.

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