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Title:
Experimental Pd II Oscillator Strengths and the Palladium Abundance in the HgMn-Type Star chi LUPI
Authors:
Lundberg, Hans; Johansson, Sveneric G.; Larsson, Joergen; Leckrone, David S.; Litzen, Ulf; Svanberg, Sune; Wahlgren, Glenn M.; Zerne, Raoul
Publication:
Astrophysical Journal v.469, p.388 (ApJ Homepage)
Publication Date:
09/1996
Origin:
APJ
Astronomy Keywords:
ATOMIC DATA, LINE: IDENTIFICATION, STARS: ABUNDANCES, STARS: INDIVIDUAL CONSTELLATION NAME: CHI LUPI, ULTRAVIOLET: STARS
DOI:
10.1086/177788
Bibliographic Code:
1996ApJ...469..388L

Abstract

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 t9 lines, in addition to other Pd II 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 (NPd) = +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.

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