Radiative transfer is one of the major tools to analyze astronomical data.
Due to its high dimensionality and the non-linear and non-local transport equation it is also a
severe computational challenge.
Given the importance of cosmic dust grains in astrophysical research, the last ten years have seen substantial coding efforts to provide dust radiative transfer programs. As a successor of a workshop in 2008 in Heidelberg, RT13 has assembled many dust RT coders discussing the state-of-the-art, the difficulties and unsolved problems, how benchmarks can test the codes, and what future perspectives are promising.
RT13 was organized by Jürgen Steinacker, Karl Gordon, and Maarten Baes.