On the Modified Random Walk for Monte-Carlo Radiation Transfer

Details On the Modified Random Walk for Monte-Carlo Radiation Transfer On the Modified Random Walk for Monte-Carlo Radiation Transfer

2010-09-30

arxiv.org/abs/1010.0001v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

Accepted for publication in A&A

Scientific paper

Min et al. (2009) presented two complementary techniques that use the diffusion approximation to allow efficient Monte-Carlo radiation transfer in very optically thick regions: a modified random walk and a partial diffusion approximation. In this note, I show that the calculations required for the modified random walk method can be significantly simplified. In particular, the diffusion coefficient and the mass absorption coefficients required for the modified random walk are in fact the same as the standard diffusion coefficient and the Planck mean mass absorption coefficient.

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