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Comparison of New Experimental and Astrophysical F-values For Some Ru-ii Lines, Observed In Hst Spectra of Chi-lupi

Publiceringsår: 1994
Språk: Engelska
Sidor: 809-815
Publikation/Tidskrift/Serie: Astrophysical Journal
Volym: 421
Nummer: 2
Dokumenttyp: Artikel
Förlag: IOP


We report on experimental absolute oscillator strengths for 18 UV lines of Ru II, obtained by combining laser-induced fluorescence measurements of radiative lifetimes and branching fractions from line intensities in a calibrated Fourier-transform spectrum. HST/GHRS observations of the spectrum of the sharp-lined B star chi Lupi contain six of these lines, for which ''astrophysical'' relative f-values have been determined. The agreement is within 0.10 dex for a Ru abundance of log N(Ru)/N(H) = -7.90, which is 2.3 dex above the solar abundance.



  • Physics and Astronomy


  • ISSN: 0004-637X

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