Non-LTE line formation in early B and late O stars. I - Singly ionized oxygen

Details Non-LTE line formation in early B and late O stars. I - Singly ionized oxygen Non-LTE line formation in early B and late O stars. I - Singly ionized oxygen

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...201..232b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 201, no. 2, Aug. 1988, p. 232-246.

Astronomy and Astrophysics

Astrophysics

98

B Stars, Early Stars, Late Stars, O Stars, Star Formation, Stellar Spectra, Line Spectra, Nonequilibrium Thermodynamics, Oxygen Spectra, Radiative Transfer, Stellar Atmospheres

Scientific paper

An extensive model atom for a non-LTE line formation calculation for O II is presented. Based on model atmospheres for B stars with parameters in the range Teff = 24,000K to 33,000K, log g = 3.5 to 4.5, ɛHe = 0.1, a grid of equivalent widths for over 100 O II lines between 4000 Å and 5000 Å has been calculated (log ɛ = -3.62, -3.12 (solar), -2.62, microturbulent velocities 0 km s-1, 5 km s-1 and 10 km s-1) in both LTE and non-LTE. The grid is discussed briefly. As an application and test of the model, τ Sco (B0 V) and 10 Lac (O9 V) have been analysed.

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