Astron. Astrophys. Suppl. Ser. 144, 517-522
Ab initio calculations of oscillator strengths and Landé factors
1 - Department of Natural Sciences, University of Michigan-Dearborn,
4901 Evergreen Rd., Dearborn, MI 48128, U.S.A.
Department of Astronomy,
University of Michigan-Ann Arbor, 953 Dennison Building, Ann Arbor, MI
Received March 3; accepted April 14, 2000
Theoretical calculations of oscillator strengths and Landé g
made with the Cowan code are presented for the
rare-earth ion Ndiii. The emphasis is on
transitions in the optical region of the spectrum.
Comparisons of previous ab initio calculations of this type
for other lanthanides (e.g., Laii, Ceiii, and Luii)
with published experimental and theoretical data suggest that
the accuracy of the log(gf
) values for individual transitions should be about
dex in the absence of significant core polarization effects; the g
should be good to better than 5%, except in a few cases where term mixing is
important. Applications of the data are made in
the calculation of neodymium abundances in the atmospheres of the chemically peculiar stars
HD101065 ("Przybylski's star") and HD122970.
Key words: atomic data -- line: formation -- stars: chemically peculiar --
Copyright The European Southern Observatory (ESO)