The formation of interstellar molecular lines in a turbulent velocity field with finite correlation length. II - The case sigma much greater than v(therm)

Details The formation of interstellar molecular lines in a turbulent velocity field with finite correlation length. II - The case sigma much greater than v(therm) The formation of interstellar molecular lines in a turbulent velocity field with finite correlation length. II - The case sigma much greater than v(therm)

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...270..407k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 270, no. 1-2, p. 407-415.

Astronomy and Astrophysics

Astrophysics

22

Carbon Monoxide, Interstellar Radiation, Line Spectra, Magnetohydrodynamic Turbulence, Molecular Spectra, Carbon 12, Carbon 13, Mixing Ratios, Nonequilibrium Thermodynamics

Scientific paper

We investigated the formation of interstellar molecular lines in a turbulent velocity field with finite correlation length, extending previous work (Albrecht and Kegel, 1987) to the regime sigma much greater than V(therm). For this we transformed the generalized transfer equation by introducing a new, Delta(nu)-dependent velocity coordinate the origin of which corresponds to the center of the profile of the absorption coefficient. This transformation allows in the case of sigma much greater than V(therm) to reduce the numerical effort considerably. We give numerical results for NLTE-calculations for a 10-level CO molecule for (sigma/v(therm)) = 20 as well as for comparison for sigma = v(therm). Our results show that a finite correlation length affects strongly the line profiles, the line width, and the intensity ratios. At low densities also the excitation conditions are effected, i.e., the NLTE-effects are modified. These effects increase with inceasing ratio sigma/v(therm).

Affiliated with

Also associated with

No associations

Rating

The formation of interstellar molecular lines in a turbulent velocity field with finite correlation length. II - The case sigma much greater than v(therm) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The formation of interstellar molecular lines in a turbulent velocity field with finite correlation length. II - The case sigma much greater than v(therm), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The formation of interstellar molecular lines in a turbulent velocity field with finite correlation length. II - The case sigma much greater than v(therm) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1440589