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Experimental Pd II oscillator strengths and the palladium abundance in the HgMn-type star chi Lupi

Författare:
Publiceringsår: 1996
Språk: Engelska
Sidor: 388-392
Publikation/Tidskrift/Serie: Astrophysical Journal
Volym: 469
Nummer: 1
Dokumenttyp: Artikel i tidskrift
Förlag: University of Chicago Press

Sammanfattning

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.

Nyckelord

  • Atom and Molecular Physics and Optics

Övriga

Published
  • ISSN: 0004-637X

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