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Transition probabilities for the UV0.01 multiplet in N III

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Author

Summary, in English

We report on large-scale ah initio multiconfiguration Hartree-Fock calculations for the UV0.01 multiplet, 2s(2)2p(2)P(J)-2s2p(2 4) P-J', in N III. The resulting transition probabilities agree very well with recent semiempirical calculations, and the lifetimes for two of the three upper levels agree with experiments. The deviation for the third level is discussed. Comparisons made with the highest quality IUE echelle spectra available-those of RR Tel and V1016 Cyg (both photoionized sources with electron densities below 10(8) cm(-3)-show that computed branching ratios of lines sharing a common upper level are in agreement with observations to within uncertainties of +/-10%. High-quality solar limb data or stellar data from the Hubble Space Telescope could, in principle, be used to determine whether the theoretical or measured lifetimes for the discrepant level are in error. Unfortunately, stellar data for high-density plasmas (N-e > 10(11) cm(-3) are needed) do not yet exist, and existing solar data lack the photometric precision to address this problem.

Publishing year

1995

Language

English

Pages

457-464

Publication/Series

Astrophysical Journal

Volume

445

Issue

1

Document type

Journal article

Publisher

American Astronomical Society

Topic

  • Physical Sciences

Keywords

  • ATOMIC DATA
  • V1016 CYGNI)
  • INDIVIDUAL (RR TELESCOPII
  • STARS
  • ULTRAVIOLET
  • GENERAL

Status

Published

ISBN/ISSN/Other

  • ISSN: 0004-637X