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Theoretical oscillator strengths for Sr II and Y III, with application to abundances in the HgMn-type star chi Lupi

På svenska

Author

  • Tomas Brage
  • Glenn Wahlgren
  • Sveneric Johansson
  • DS Leckrone
  • CR Proffitt

Summary, in English

Oscillator strengths for selected transitions of Sr II and Y III have been determined using ab initio multiconfiguration Hartree-Fock techniques. The importance of including an accurate treatment of the core-valence correlation is emphasized. The results are used to determine the abundances of Sr and Y in the chemically peculiar star chi Lupi from HST/GHRS Echelle spectra. Overabundances of 2.09 dex for Sr and 2.8 dex for Y relative to the solar abundance are derived, and an ionization imbalance of +1.1 dex is evident from abundance determinations using Y III and Y II.

Publishing year

1998

Language

English

Pages

1051-1057

Publication/Series

Astrophysical Journal

Volume

496

Issue

2

Document type

Journal article

Publisher

American Astronomical Society

Topic

  • Astronomy, Astrophysics and Cosmology

Keywords

  • atomic data
  • abundances
  • stars
  • individual (chi Lupi)

Status

Published

ISBN/ISSN/Other

  • ISSN: 0004-637X