Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss.189..171w&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 189, no. 2, March 1992, p. 171-180.
Astronomy and Astrophysics
Astrophysics
1
Astronomical Spectroscopy, Line Spectra, Nonequilibrium Thermodynamics, Radiative Transfer, H Lines, Iterative Solution, Linear Equations
Scientific paper
This paper introduces a new method of solving the equation of multi-level non-LTE radiative transfer subject to constraints. This method is based on the combination of the advantages of the complete linearization method by Auer and Mihalas (1969) and the simple separated-iteration technique (Mihalas, 1978). First, linearize the equation of radiative transfer and constraints, respectively, then solve the linearized equation of the radiative transfer and linearized constraints, separately. It overcomes the disadvantages of requiring the simultaneous solution of the corresponding equations by the complete linearization method and the poor convergence of the simple separated-iteration technique. Therefore, it not only can deal with complex models, but also has a high speed of convergence in the calculation of multi-level NLTE line formation.
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