The NLTE Formation of Iron Lines Used in Solar Polarimetry

We study in some detail one-dimensional NLTE effects in solar Fei lines. The lines selected are frequently used in solar polarimetry, and also in studies of line asymmetries and for abundance determinations. Our model atom for Fei-Feii-Feiii is realistic: it takes account of multiplet structure and...

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Bibliographic Details
Published in:Solar physics 1997-05, Vol.172 (1-2), p.117-124
Main Authors: Shchukina, Nataliya G, Bueno, Javier Trujillo, Kostik, Roman I
Format: Article
Language:English
Subjects:
Asymmetry
Iron
Mathematical analysis
Mathematical models
Multilevel
Polarimetry
Radiative transfer
Research projects
Solar physics
Studies
Three dimensional
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Summary:We study in some detail one-dimensional NLTE effects in solar Fei lines. The lines selected are frequently used in solar polarimetry, and also in studies of line asymmetries and for abundance determinations. Our model atom for Fei-Feii-Feiii is realistic: it takes account of multiplet structure and it includes over 200 bound-bound and bound-free transitions in detail. We use very efficient iterative methods for the self-consistent solution of the kinetic and radiative transfer equations (Auer, Fabiani Bendicho, and Trujillo Bueno, 1994). We have applied these fast methods of solution because they are suitable for the investigation of 2D and 3D NLTE transfer effects with multilevel atoms, which constitutes the next step of our ongoing research project on the iron line formation problem.
ISSN:0038-0938
1573-093X
DOI:10.1023/A:1004961329112