Log (gf) for singly-ionized elements of the iron group

Details Log (gf) for singly-ionized elements of the iron group Log (gf) for singly-ionized elements of the iron group

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ap%26ss.107..303m&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 107, no. 2, Dec. 1984, p. 303-312. Research supported by SECYT.

Astronomy and Astrophysics

Astrophysics

2

Iron, Metal Ions, Metallicity, Solar Spectra, Stellar Composition, Abundance, Photosphere, Spectrum Analysis

Scientific paper

Systematic corrections are applied to Warner's-log(gf) values for the Fe II group in order to obtain moderately accurate oscillator strengths. Warner's values are compared with those of Kurcuz and Peytremann (K-P) /Sc II, Ti II, V II, Cr II, Mn II, Co II, and Ni II/ and Kurucz (K) /Fe II/. Log(gf) is calculate semi-empirically by K-P and K for many transitions using scaled Thomas-Fermi-Dirac potentials for the atoms of the elements ranging from B to Ni. It is shown that although the individual values may be in error, the mean absolute scale for each element is acceptable, being affected at most by small errors. Samples of data distributed in rather broad wavelength intervals and wide ranges of energy levels and log(gf) are analyzed. The limitation of KP-log(gf) values only allows deriving mean corections to be aplied to more or less large samples of lines, but not individual corrections to multiplets or lines. It is shown qualitatively that the abundances consistent with the accepted values of Ross and Aller (1976) and Engvold (1977) are found in the solar photosphere, using Warner's corrected log(gf) for the elements.

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