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Transition probabilities for the UV0.01 multiplet in N III

Brage, Tomas LU ; Fischer, CF and Judge, PG (1995) In Astrophysical Journal 445(1). p.457-464
Abstract
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... (More)
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. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
ATOMIC DATA, V1016 CYGNI), INDIVIDUAL (RR TELESCOPII, STARS, ULTRAVIOLET, GENERAL
in
Astrophysical Journal
volume
445
issue
1
pages
457 - 464
publisher
University of Chicago Press
external identifiers
  • wos:A1995QY12900045
ISSN
0004-637X
DOI
10.1086/175710
language
English
LU publication?
no
id
32a77df2-69f7-483a-96bf-3497db9a2091 (old id 3918970)
date added to LUP
2013-07-08 14:33:55
date last changed
2016-06-29 09:06:20
@article{32a77df2-69f7-483a-96bf-3497db9a2091,
  abstract     = {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.},
  author       = {Brage, Tomas and Fischer, CF and Judge, PG},
  issn         = {0004-637X},
  keyword      = {ATOMIC DATA,V1016 CYGNI),INDIVIDUAL (RR TELESCOPII,STARS,ULTRAVIOLET,GENERAL},
  language     = {eng},
  number       = {1},
  pages        = {457--464},
  publisher    = {University of Chicago Press},
  series       = {Astrophysical Journal},
  title        = {Transition probabilities for the UV0.01 multiplet in N III},
  url          = {http://dx.doi.org/10.1086/175710},
  volume       = {445},
  year         = {1995},
}