Non-LTE calculations of O II line strengths in early-type stars

Details Non-LTE calculations of O II line strengths in early-type stars Non-LTE calculations of O II line strengths in early-type stars

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.230..443b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 230, Feb. 1, 1988, p. 443-450. Research supported by th

Astronomy and Astrophysics

Astronomy

11

Early Stars, Line Spectra, Nonequilibrium Thermodynamics, Oxygen Spectra, Absorption Spectra, B Stars, O Stars, Stellar Temperature

Scientific paper

Non-LTE line formation calculations based on the "complete linearization method" have been undertaken for the O II ion in early-type stars. Equivalent widths have been predicted for visible region transitions in 15 multiplets for effective temperatures from 25000 to 35000K, logarithmic gravities of 3.5, 4.0 and 4.5, microturbulent velocities of 0 and 5 km s-1 and logarithmic oxygen abundances of approximately 8.3, 8.8 and 9.3. Non-LTE line strengths are larger than corresponding LTE values, differences becoming increasingly significant for stronger transitions.

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