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Solar Oscillator Strengths as a Diagnostic Tool

Published online by Cambridge University Press:  08 February 2017

E. A. Gurtovenko ,
R. I. Kostik  and
R. J. Rutten
E. A. Gurtovenko
Affiliation:
1Main Astronomical Observatory, Academy of Sciences of the Ukrainian SSR, 252127 Kiev, USSR
R. I. Kostik
Affiliation:
1Main Astronomical Observatory, Academy of Sciences of the Ukrainian SSR, 252127 Kiev, USSR
R. J. Rutten
Affiliation:
2Sterrekundig Instituut, Postbus 80000, NL-3508 TA, Utrecht, The Netherlands

Abstract

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We briefly review the Kiev program for determining oscillator strengths of Fraunhofer lines from the optical solar spectrum, which has recently resulted in a compilation of solar gf-values for 1958 lines from 40 chemical elements (Gurtovenko and Kostik 1989). These gf-values were determined empirically by fitting solar lines using standard plane-parallel LTE modelling. Errors in this modelling propagate into the gf-values; reversely, the deviations in the latter may serve as diagnostics of the modelling and thus of spectral line formation in the solar photosphere. For a small subset, comparison with reliable laboratory data can be made; for other lines there is information in the differences between fits of the line area and of the line depth.

Type
I. Global Properties of the Photosphere
Information
Symposium - International Astronomical Union , Volume 138: Solar Photosphere: Structure, Convection and Magnetic Fields , 1990 , pp. 35 - 40
Copyright
Copyright © Kluwer 1990 

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