THE MODIFICATION OF CHIANTI FOR THE COMPUTATION OF SYNTHETIC EMISSION SPECTRA FOR THE ELECTRON NON-THERMAL DISTRIBUTIONS

摘要

CHIANTI contains atomic data for the majority of the astronomically interesting ions and has a very good software support. The modification of CHIANTI software and broadening of its database has been done to be able to compute the synthetic emission spectra for the electron non-thermal distributions and to diagnose the shape of the electron distribution function. As CHIANTI database contains only the collision strengths averaged over the Maxwellian distribution, the functional form of the approximation has been used to evaluate the approximation for Omega from CHIANTI by inverse technique. Computed approximations of Omega-s have been compared with the data known from TIPbase. The modification of CHIANTI codes which uses derived approximations of Omega allows quick computation of the line intensities and synthetic spectra for two different groups of nonthermal distributions: the power and kappa electron distributions. New code in CHIANTI allows to model the influence of the shape of the electron distribution function on the line spectrum, to find the lines whose intensities are sensitive to the shape of the electron distribution function and searching for the lines which are suitable for the diagnostics of the non-thermal distributions.