The SI III 1892 A/C III 1908 A emission-line ratio in late-type stars
Abstract
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.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- April 1987
- DOI:
- 10.1093/mnras/225.4.859
- Bibcode:
- 1987MNRAS.225..859K
- Keywords:
-
- Emission Spectra;
- Late Stars;
- Stellar Atmospheres;
- Stellar Spectra;
- Ultraviolet Spectra;
- Astrophysics