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Diagnostics of Non-thermal Particles in Solar Chromospheric Flares

Published online by Cambridge University Press:  26 May 2016

C. Fang ,
Z. Xu  and
M. D. Ding
C. Fang
Affiliation:
Department of Astronomy, Nanjing University, Nanjing, 210093, China
Z. Xu
Affiliation:
Department of Astronomy, Nanjing University, Nanjing, 210093, China
M. D. Ding
Affiliation:
Department of Astronomy, Nanjing University, Nanjing, 210093, China

Abstract

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Particle beam bombardment on the solar chromosphere produces non-thermal ionization and excitation. The effect on hydrogen lines is investigated by using non-LTE theory and semi-empirical flare models. It has been found that in the case of electron bombardment, the Hα line is widely broadened and enhanced. Significant enhancements at the wings of Lyα and Lyβ lines are also predicted. In the case of proton bombardment, less strong broadening and less central reversal are expected. We found that the total energy flux of the particle beam and the atmospheric condition give much influence on the line profiles, which, however, are less sensitive to the power index. Based on the Hα line profile measurement, a method to deduce the total energy flux of the particle beam is proposed.

Type
Part 4: High Energy Phenomena in Sun and Stars
Information
Symposium - International Astronomical Union , Volume 219: Stars as Suns : Activity, Evolution and Planets , 2004 , pp. 171 - 175
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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