Theoretical values for the [OIII] 5007/4959 line-intensity ratio and homologous cases
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.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- March 2000
- DOI:
- 10.1046/j.1365-8711.2000.03184.x
- Bibcode:
- 2000MNRAS.312..813S
- Keywords:
-
- ATOMIC DATA;
- LINE: FORMATION;
- TECHNIQUES: SPECTROSCOPIC;
- HII REGIONS;
- PLANETARY NEBULAE: GENERAL