## 2. The line transfer equationsIn order to model the individual line of a particular molecule one needs to solve the Non-LTE line transfer equations. The two level atom line transfer equation in the plane parallel stratified medium can be written as (Mihalas 1978) where where is the continuum source function which is set equal to the Planck function and the line source function is written as where is the probability per
scattering that the photon is destroyed by collisional de-excitation
and is given by (Mihalas 1978)
is the rate of collisional
de-excitation and is the rate of
spontaneous emission. © European Southern Observatory (ESO) 2000 Online publication: June 8, 2000 |