Theoretical values for the [Oiii] 5007/4959 line-intensity ratio and homologous cases

Details Theoretical values for the [Oiii] 5007/4959 line-intensity ratio and homologous cases Theoretical values for the [Oiii] 5007/4959 line-intensity ratio and homologous cases

Publishing date

Mar 2000

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mnras.312..813s&link_type=abstract

Journals

Monthly Notices of the Royal Astronomical Society, Volume 312, Issue 4, pp. 813-816.

Science

Astronomy and Astrophysics

Field

Astronomy

Additional info 2

88

Additional info 3

Atomic Data, Line: Formation, Techniques: Spectroscopic, Hii Regions, Planetary Nebulae: General

Type

Scientific paper

Abstract

The magnetic-dipole probabilities for the 1D2-3P2 and 1D2-3P1 transitions in carbon-like and oxygen-like ions are calculated up to atomic number Z=12, including relativistic corrections to the magnetic dipole operator. The ratio of the probabilities for these two transitions is found to change by up to 5 per cent compared with previous theoretical work, none of which included these relativistic corrections, with the effect being largest for the near neutral ions. The transition probability ratio for the [Oiii] 5007 and 4959Å lines is found to be 3.01, implying an intensity ratio of 2.98, in significantly better agreement with the observed ratio than the earlier theoretical work.

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