SI III emission line strengths in low density plasmas.
Abstract
Theoretical emissivity ratios appropriate to homogeneous optically thin plasmas are presented for the Si III lines at 1883 and 1892 Å. These lines are a useful density diagnostic for Ne ≥ 104cm-3, their use being illustrated for the planetary nebulae NGC 7662 and V1016 Cygni.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- July 1984
- DOI:
- 10.1093/mnras/209.1.1P
- Bibcode:
- 1984MNRAS.209P...1D
- Keywords:
-
- Cosmic Plasma;
- Emission Spectra;
- Plasma Spectra;
- Rarefied Plasmas;
- Silicon;
- Ultraviolet Astronomy;
- Collision Parameters;
- Planetary Nebulae;
- Plasma Density;
- Plasma Diagnostics;
- Spectral Line Width;
- Astrophysics