Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.213..721h&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 213, April 1, 1985, p. 721-734. Research supported by t
Astronomy and Astrophysics
Astronomy
43
Abundance, Interstellar Matter, Nitrogen, Optical Transition, Oscillator Strengths, Configuration Interaction, Forbidden Transitions, Interstellar Extinction, Oao 3, Transition Probabilities, Wave Functions
Scientific paper
Oscillator strengths based on configuration interaction wavefunctions are presented for both optically allowed and forbidden transitions in N I. Particular attention is given to the multiplets at 951 Å (2p3 4S-2p23d2D), 952 Å (2p3 4S-2p23d4D) and 1160 Å (2p3 4S-2p23s2P) which have been extensively observed by the COPERNICUS satellite. For these transitions, the radiative rates are estimated to have an accuracy of 20 per cent or better. A re-analysis of the COPERNICUS observational data indicates there is no depletion of nitrogen towards reddened stars. Possible causes of a small depletion (≅0.2 dex) towards several nearby unreddened stars are discussed.
Dufton Philip L.
Hibbert Alan
Keenan Francis P.
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