The formation of interstellar molecular lines in a turbulent velocity field with finite correlation length.
Abstract
The authors investigate by means of numerical calculations the formation of interstellar molecular lines in a turbulent velocity field with finite correlation length. They have applied the theory developed by Gail et al. (1975, 1980) to the model of a homogeneous plane parallel slab. They have solved the full NLTE-problem, i.e. the generalized transfer equations simultaneously with the rate equations, the model molecule being a 6-level CO molecule. The results show that a finite correlation length affects strongly the line profiles, the line widths, and the intensity ratios, in particular the ratios of corresponding transitions in different isotopic species.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- April 1987
- Bibcode:
- 1987A&A...176..317A
- Keywords:
-
- Interstellar Matter;
- Line Spectra;
- Molecular Spectra;
- Turbulence;
- Astronomical Models;
- Isotopes;
- Nonequilibrium Thermodynamics;
- Radiative Transfer;
- Spectral Line Width;
- Astrophysics