The SI III 1892 A/C III 1908 A emission-line ratio in late-type stars

Details The SI III 1892 A/C III 1908 A emission-line ratio in late-type stars The SI III 1892 A/C III 1908 A emission-line ratio in late-type stars

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.225..859k&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 225, April 15, 1987, p. 859-861. SERC-supported researc

Astronomy and Astrophysics

Astronomy

17

Emission Spectra, Late Stars, Stellar Atmospheres, Stellar Spectra, Ultraviolet Spectra

Scientific paper

Theoretical values of the density-sensitive emission-line ratio R = I(Si III 3s21S-3s3p3P1)/I(C III 2s21S-2s2p3P1 = I(1892 Å)/I(1908 Å) are presented for a range of electron densities (108 ≤ Ne ≤ 1013cm-3) applicable to late-type stellar atmospheres. These results differ from the earlier calculations of Doschek et al. and Cook & Nicolas, mainly due to the improved electron excitation rates for Si III adopted in the present analysis.

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