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

Summary, in English

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.

• Author: S. G Johansson; A Joueizadeh; Ulf Litzén; Jörgen Larsson; Anders Persson; Claes-Göran Wahlström; Sune Svanberg; D. S Leckrone; G. M Wahlgren
• Department/s: Lund Observatory - Has been reorganised; Atomic Physics
• Publishing year: 1994
• Language: English
• Pages: 809-815
• Publication/Series: Astrophysical Journal
• Volume: 421
• Issue: 2
• Full text: - 305 kB; Download statistics
• Links: http://dx.doi.org/10.1086/173693
• Document type: Journal article
• Publisher: American Astronomical Society
• Topic: Atom and Molecular Physics and Optics
• Status: Published
• ISBN/ISSN/Other: ISSN: 0004-637X