Line formation in the presence of turbulence

Details Line formation in the presence of turbulence Line formation in the presence of turbulence

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...144..186m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 144, no. 1, March 1985, p. 186-190.

Statistics

Computation

9

Computational Astrophysics, Line Spectra, Radiative Transfer, Thermodynamic Equilibrium, Turbulence Effects, Velocity Distribution, Approximation, Astronomical Models

Scientific paper

The problem of line formation in the presence of a random velocity field only requires direct computation of the mean value of the radiative intensity. The author shows how the layer addition formalism both provides a physical solution to this problem and can deal with any spatially correlated velocity field. Specific formulae are derived for the LTE case that agree with previous classical results. A solution to the non-LTE case is given in terms of an approximation that extends a solution already proposed in the rigid cell model.

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