COMPARISON OF NEW EXPERIMENTAL AND ASTROPHYSICAL F-VALUES FOR SOME RU-II LINES, OBSERVED IN HST SPECTRA OF CHI-LUPI

Authors
JOHANSSON SG JOUEIZADEH A LITZEN U LARSSON J PERSSON A WAHLSTROM CG SVANBERG S LECKRONE DS WAHLGREN GM
Citation
Sg. Johansson et al., COMPARISON OF NEW EXPERIMENTAL AND ASTROPHYSICAL F-VALUES FOR SOME RU-II LINES, OBSERVED IN HST SPECTRA OF CHI-LUPI, The Astrophysical journal, 421(2), 1994, pp. 809-815
Citations number
21
Categorie Soggetti
Astronomy & Astrophysics
Journal title
The Astrophysical journal → ACNP
ISSN journal
0004637X
Volume
421
Issue
2
Year of publication
1994
Part
1
Pages
809 - 815
Database
ISI
SICI code
0004-637X(1994)421:2<809:CONEAA>2.0.ZU;2-D
Abstract
We report on experimental absolute oscillator strengths for 18 UV line s of Ru II, obtained by combining laser-induced fluorescence measureme nts of radiative lifetimes and branching fractions from line intensiti es in a calibrated Fourier-transform spectrum. HST/GHRS observations o f the spectrum of the sharp-lined B star chi Lupi contain six of these lines, for which ''astrophysical'' relative f-values have been determ ined. 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.