Oscillator strength calculations in CE III: application to HD 200311

Details Oscillator strength calculations in CE III: application to HD 200311 Oscillator strength calculations in CE III: application to HD 200311

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997mnras.284..869b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 284, Issue 4, pp. 869-873.

Astronomy and Astrophysics

Astronomy

23

Atomic Data, Line: Formation, Stars: Abundances, Stars: Individual: Hd 200311

Scientific paper

We have calculated oscillator strengths for the Ce III 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 II lines. 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.

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