Oscillator strength calculations in Ce III: application to HD 200311
- 1 February 1997
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 284 (4) , 869-873
- https://doi.org/10.1093/mnras/284.4.869
Abstract
We have calculated oscillator strengths for the Ce m spectrum using the atomic structure code of R. D. Cowan. The results are used to determine the cerium abundance in the silicon star HD 200311. From the dominant ion (Ce++), we find an excess of 5 dex. We find very good agreement with the abundance obtained from Ce n Unes. While uncertainties remain with the oscillator strengths, it is no longer possible to assume that underionization could explain the extraordinary abundance excess of the lanthanide cerium in this hot, magnetic, chemically peculiar star.Keywords
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