The influence of a stochastic velocity field with a finite scale length 1 on the transfer of line radiation is described by means of a generalization of the transfer equation. Micro- and macroturbulence are contained in this mesoturbulence approach as limiting cases 1 → 0 and 1 - ∞ respectively.
KeywordsVelocity Field Radiative Transfer Transfer Equation Equivalent Width Line Radiation
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