Advanced ab initio relativistic calculations of transition probabilities for some O i and O iii emission lines

This work presents new ab initio relativistic calculations using the multiconfiguration Dirac–Hartree–Fock method of some O i and O iii transition lines detected in B-type and Wolf–Rayet stars. Our results are the first able to be presented in both the length and velocity gauges, with excellent gaug...

Full description

Saved in:
Bibliographic Details
Published inMonthly notices of the Royal Astronomical Society Vol. 440; no. 4; pp. 3439 - 3443
Main Authors Nguyen, T. V. B., Chantler, C. T., Lowe, J. A., Grant, I. P.
Format Journal Article
LanguageEnglish
Published London Oxford University Press 01.06.2014
Subjects
Emissions
Experiments
Measurement
Stars & galaxies
Velocity
atomic processes
line: identification
ultraviolet: stars
atomic data
astronomical data bases: miscellaneous
techniques: spectroscopic
Online AccessGet full text

Cover

More Information
Summary:This work presents new ab initio relativistic calculations using the multiconfiguration Dirac–Hartree–Fock method of some O i and O iii transition lines detected in B-type and Wolf–Rayet stars. Our results are the first able to be presented in both the length and velocity gauges, with excellent gauge convergence. Compared to previous experimental and theoretical uncertainties of up to 50 per cent, our accuracies appear to be in the range of 0.33–5.60 per cent, with gauge convergence up to 0.6 per cent. Similar impressive convergence of the calculated energies is also shown. Two sets of theoretical computations are compared with earlier tabulated measurements. Excellent agreement is obtained with one set of transitions but an interesting and consistent discrepancy exists between the current work and the prior literature, deserving of future experimental studies.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stu511