Diagnostics of Non-thermal Particles in Solar Chromospheric Flares

Details Diagnostics of Non-thermal Particles in Solar Chromospheric Flares Diagnostics of Non-thermal Particles in Solar Chromospheric Flares

Publishing date

Jan 2004

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..219..171f&link_type=abstract

Journals

Stars as suns : activity, evolution and planets, Proceedings of the 219th symposium of the International Astronomical Union held

Science

Astronomy and Astrophysics

Field

Astronomy

Additional info 2

1

Type

Scientific paper

Abstract

Particle beam bombardments on the solar chromosphere will produce non-thermal ionization and excitation. The effect on hydrogen lines has been extensively investigated by using non-LTE theory and semi-empirical flare models. It has been found that Halpha line is widely broadened and shows a strong central reversal. Significant enhancements at the wings of Lyalpha and Lybeta lines are also predicted. In the case of proton bombardment less strong broadening and no large central reversal are expected. We found that the coronal mass and the atmospheric condition give much influence on the line profiles. The line profiles are good tools for diagnosing the total flux of the particle beam but less sensitive to the power index. One can use these factors to diagnose the particle beam in the chromosphere.

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