Effects of partial frequency redistribution functions R(II), R(III) and R(V) on source functions

Abstract

The effects of partial frequency redistribution on the formation of spectral lines have been studied. The angle-averaged R(II), R(III) and R(V) types of redistribution with isotropic phase function have been considered. Transfer equation with plane-parallel geometry is solved in isothermal atmospheres. For an atmosphere with constant thermal sources, the frequency-dependent source function S/L/(R/V/) lies below S/L/(R/III/) but above S/L/(R/II/) in the line wings.