A Fast Method for the Determination of Emergent Intensities in Radiative Transfer Theory
Abstract
One of the quantities usually required when solving the equation of radiative transfer is the intensity of radiation emerging from the surface of the medium under consideration. For multidimensional situations however, the methods presented to date have been numerical, and these first calculate the socalled source function S_{v} (r, Ω) as a function of position r, angle Ω and frequency v. This is generally the most difficult part of the exercise since an integrodifierential equation must be solved. The emergent intensity is then determined by solving a relatively simple first order differential equation by any of the well known numerical integration schemes. However, if the emergent intensity is required at a large number of angles, frequencies, and positions on the surface of the medium, and this is usually the case, the amount of computing needed may be considerable.
 Publication:

Proceedings of the Astronomical Society of Australia
 Pub Date:
 July 1971
 DOI:
 10.1017/S132335800001273X
 Bibcode:
 1971PASAu...2...42C