Empirical improvement in accuracy of atomic oscillator strengths calculated by Kurucz and Peytremann

Details Empirical improvement in accuracy of atomic oscillator strengths calculated by Kurucz and Peytremann Empirical improvement in accuracy of atomic oscillator strengths calculated by Kurucz and Peytremann

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.204..141b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 204, July 1983, p. 141-150. Research supported by the S

Astronomy and Astrophysics

Astronomy

25

Astronomical Spectroscopy, Atomic Spectra, Line Spectra, Oscillator Strengths, Errors, Fine Structure, Stellar Atmospheres

Scientific paper

The oscillator strengths for lines of Fe I, Ti I, Ti II, Cr I, Mn I, Ca I, together with solar Fe II values as calculated by Kurucz and Peytremann (1975) are compared with the measured values made at Oxford (Blackwell et al., 1979-1983). It is determined that the deviations between the two sets of oscillator strength data for individual multiplets are much smaller than the average deviation for all lines of each element. It is demonstrated that the oscillator strengths calculated by the semi-empirical method of Kurucz and Peytremann may be calibrated in this way to give oscillator strengths of improved accuracy which would be more useful for the construction of model stellar atmospheres and for use in spectral synthesis work. Several methods for implementing this calibration are presented. A test of the method using 407 lines of these elements is found to give standard deviations of errors of less than 0.1 dex, with the omission of a few lines. A theoretical interpretation of the regularities in errors is also presented.

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