Diagnostic of the Non-thermal kappa-Distribution from Si III Lines

Details Diagnostic of the Non-thermal kappa-Distribution from Si III Lines Diagnostic of the Non-thermal kappa-Distribution from Si III Lines

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008espm...122.112k&link_type=abstract

"12th European Solar Physics Meeting, Freiburg, Germany, held September, 8-12, 2008. Online at http://espm.kis.uni-freiburg.de/,

Physics

Scientific paper

The SUMER observations have shown that some of Si III line ratios can not be explained under assumption of the Maxwell distribution. One of non-thermal distribution very likely to occur in transition region due to its high density and temperature gradients is a ?-distribution. This kind of non-thermal distribution has an enhanced number of particles in its high energy tail in comparison with Maxwell distribution. A set of synthetic spectra for different values of parameter ? of non-distribution has been computed for Ne from 107 to 1013 cm-3 and for T from 104 to 105.2 K. The comparison of the observed and computed spectra has shown that neither ?-distribution is not able to explain all peculiarities in the Si III line ratios.

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