Mathematics – Probability
Scientific paper
Oct 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.446..447l&link_type=abstract
8th SOHO Workshop: Plasma Dynamics and Diagnostics in the Solar Transition Region and Corona. Proceedings of the Conference hel
Mathematics
Probability
Scientific paper
A model is described for predicting the Balmer continuum edge spectrum from solar prominences. A collisional-radiative model, modified to account for opacity and the effects of plasma microfields, is used to calculate the level populations of the emitting atoms. To account for opacity, an escape factor is developed that is analytically continuous from bound to free states, thus self absorption in both lines and continua can be modelled. The plasma microfields, which are set up by the surrounding ions, cause line blending, an effective reduction of high n-shell statistical weights and line attenuation, due to high n-shell electrons being field ionized into the continuum. This leads to a shift in the frequency of the continuum edge. The probability of a field ionization occuring is defined, and used as a further parametric adjustment to the Einstein A-values within the statistical balance equation framework.
Loch Stuart
Summers Hugh P.
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