Collision strengths for nebular [O III] optical and infrared lines

P. J. Storey, Taha Sochi, N. R. Badnell

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

We present electron collision strengths and their thermally averaged values for the nebular forbidden lines of the astronomically abundant doubly ionized oxygen ion, O2+, in an intermediate coupling scheme using the Breit–Pauli relativistic terms as implemented in an R-matrix atomic scattering code. We use several atomic targets for the R-matrix scattering calculations including one with 72 atomic terms. We also compare with new results obtained using the intermediate coupling frame transformation method. We find spectroscopically significant differences against a recent Breit–Pauli calculation for the excitation of the [O iii] λ4363 transition but confirm the results of earlier calculations.
LanguageEnglish
Pages3028-3039
Number of pages12
JournalMonthly Notices of the Royal Astronomical Society
Volume441
Issue number1
Early online date28 May 2014
DOIs
Publication statusPublished - 11 Jul 2014

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collision
collisions
scattering
matrix
S matrix theory
oxygen ions
electron scattering
electron
oxygen
ion
excitation
calculation
method
code

Keywords

  • atomic data
  • atomic processes
  • non-thermal radiation mechanisms
  • planetary nebulae
  • infrared

Cite this

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abstract = "We present electron collision strengths and their thermally averaged values for the nebular forbidden lines of the astronomically abundant doubly ionized oxygen ion, O2+, in an intermediate coupling scheme using the Breit–Pauli relativistic terms as implemented in an R-matrix atomic scattering code. We use several atomic targets for the R-matrix scattering calculations including one with 72 atomic terms. We also compare with new results obtained using the intermediate coupling frame transformation method. We find spectroscopically significant differences against a recent Breit–Pauli calculation for the excitation of the [O iii] λ4363 transition but confirm the results of earlier calculations.",
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Collision strengths for nebular [O III] optical and infrared lines. / Storey, P. J.; Sochi, Taha; Badnell, N. R.

In: Monthly Notices of the Royal Astronomical Society, Vol. 441, No. 1, 11.07.2014, p. 3028-3039.

Research output: Contribution to journalArticle

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AU - Sochi, Taha

AU - Badnell, N. R.

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AB - We present electron collision strengths and their thermally averaged values for the nebular forbidden lines of the astronomically abundant doubly ionized oxygen ion, O2+, in an intermediate coupling scheme using the Breit–Pauli relativistic terms as implemented in an R-matrix atomic scattering code. We use several atomic targets for the R-matrix scattering calculations including one with 72 atomic terms. We also compare with new results obtained using the intermediate coupling frame transformation method. We find spectroscopically significant differences against a recent Breit–Pauli calculation for the excitation of the [O iii] λ4363 transition but confirm the results of earlier calculations.

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KW - atomic processes

KW - non-thermal radiation mechanisms

KW - planetary nebulae

KW - infrared

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