Radiative transfer in prominence fine structures as a multicomponent atmosphere

We used Ambartsumains method of the addition of layers to show that various problems of radiative transfer in a plane-parallel inhomogeneous atmosphere may be reduced to the solution of the cauchy problems for linear differential equations. The idea of this approach is that we start with determining the reflection and transmission coefficients of an atmosphere by solving the initial-value problem for a set of linear differential equations of the first order. Then, the internal radiation field is found immediately without solving any new equation.

There are some solar prominence fine structures which are not observable. Thus, we need to use theoretical methods to study their geometric and physical properties. It is believed that observed intensities and their fluctuations are related to such fine structures along the line of sight. This leads to presure to develop a suitable theory of radiative transfer through a multicomponent atmosphere, i.e., an atmosphere composed of single type of structural elements differing in their optical and goemetrical characteristics. So the present study is an attempt to study fine-structures in prominences with the help of intensity fluctuations.

Key words: Radiative transfer, Sun, Prominences, Fine structure