Non-LTE calculations of the N IV lines

Details Non-LTE calculations of the N IV lines Non-LTE calculations of the N IV lines

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983azh....60..717s&link_type=abstract

(Astronomicheskii Zhurnal, vol. 60, July-Aug. 1983, p. 717-726) Soviet Astronomy (ISSN 0038-5301), vol. 27, July-Aug. 1983, p. 4

Astronomy and Astrophysics

Astronomy

2

Line Spectra, Nitrogen Ions, Nonequilibrium Thermodynamics, Stellar Atmospheres, Atmospheric Models, Atomic Energy Levels, Ionization Cross Sections, Spectral Line Width

Scientific paper

The equivalent widths of singlet N IV lines are calculated for non-LTE static plane-parallel model-atmosphere grids, using the NONLTE-2 program (Sakhibullin and Kazan, 1982; Solov'eva and Kazan, 1982). The results are presented in graphs and tables and discussed. Non-LTE phenomena are identified in the formation of the 1718, 955, 6381, and 4958-A lines, and the mechanisms underlying the transition to non-LTE on the 2p, 3p, 3s, and 3d levels are explored. Applications to observations of O stars are suggested.

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