Experimental Pd II Oscillator Strengths and the Palladium Abundance in the HgMn-Type Star chi LUPI

Experimental oscillator strengths for 19 ultraviolet lines of Pd II have been derived from measurements of line intensities in calibrated Fourier transform spectra, combined with picosecond-pulse laser measurements of radiative lifetimes. Five of these 19 lines, in addition to other Pd nr lines, are...

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Published inThe Astrophysical journal Vol. 469; no. 1; p. 388
Main Authors Lundberg, Hans, Johansson, Sveneric G., Larsson, Joergen, Leckrone, David S., Litzen, Ulf, Svanberg, Sune, Wahlgren, Glenn M., Zerne, Raoul
Format Journal Article
LanguageEnglish
Published 1996
Subjects
Atom and Molecular Physics and Optics
Atom- och molekylfysik och optik
Fysik
Natural Sciences
Naturvetenskap
Physical Sciences
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Summary:Experimental oscillator strengths for 19 ultraviolet lines of Pd II have been derived from measurements of line intensities in calibrated Fourier transform spectra, combined with picosecond-pulse laser measurements of radiative lifetimes. Five of these 19 lines, in addition to other Pd nr lines, are present in Hubble Space Telescope/Goddard High-Resolution Spectrograph echelle spectra of the chemically peculiar HgMn star chi Lupi, yielding a palladium abundance of log (N-Pd) = +5.0, which is 3.3 dex above the solar abundance. Theoretical oscillator strengths have been calculated for all strong ultraviolet transitions associated with the lowest odd-parity configuration of Pd II.
ISSN:0004-637X
1538-4357
DOI:10.1086/177788