Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...176..317a&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 176, no. 2, April 1987, p. 317-328. DFG-supported research.
Astronomy and Astrophysics
Astrophysics
27
Interstellar Matter, Line Spectra, Molecular Spectra, Turbulence, Astronomical Models, Isotopes, Nonequilibrium Thermodynamics, Radiative Transfer, Spectral Line Width
Scientific paper
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.
Albrecht Miguel A.
Kegel Wilhelm H.
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