Ag. Nikoghossian et al., ON THE RADIATIVE-TRANSFER IN ATMOSPHERES WITH RANDOMLY DISTRIBUTED INHOMOGENEITIES, Astronomy and astrophysics, 325(2), 1997, pp. 813-818
We consider the problem of determining the statistical properties (int
ensity distribution, mean value and relative mean square deviation) of
radiation which emerges from a medium with randomly distributed inhom
ogeneities when scattering is taken into account. The analytical forma
lism we propose is based on Ambartsumian's method of addition of layer
s. This can be applied to both local thermodynamic equilibrium (LTE) a
nd Non-LTE cases for a wide variety of situations. A more detailed tre
atment of the special case of pure scattering, considered as the proto
type problem for the transfer of the L-alpha- line radiation, is given
. The present investigation is assumed to apply for interpreting the s
pectra of various inhomogeneous structures on the Sun. It is shown in
particular that some specific features of the extreme ultraviolet (EUV
) spectra of solar prominences may be accounted for within the framewo
rk of the theory we propose.