A Monte Carlo Study of Frequency Redistribution in an Externally Excited Medium

TL;DRAbstract

The effects of partial frequency redistribution on the transport of resonance radiation through a medium consisting of two-level atoms have been examined for an external continuum source. Models for optical depths up to l0 were considered by utilizing new methods of generating the redistribution function and a statistical technique for computing the intensity. The results show significant departures from complete frequency redistribution for source functions and intensities inside the medium. The emission line profiles also exhibit peculiar features as the result of both partial frequency redistribution and excitation from an external source. Subject headings: line formation - radiative transfer

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