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3D radiative transfer framework III Hauschildt and Baron
We present a general method to solve radiative transfer problems including
scattering in the continuum as well as in lines in 3D configurations with
periodic boundary conditions.
The scattering problem for line transfer is solved via means of an
operator splitting (OS) technique. The formal solution
is based on a full characteristics method. The approximate
operator is constructed considering nearest
neighbors exactly. The code is parallelized over both wavelength and solid angle
using the MPI library.
We present the results of several test cases with different values of
the thermalization parameter and two choices for the temperature
structure. The results are directly compared to 1D plane parallel
tests. The 3D results agree very
well with the well-tested 1D calculations.
Advances in modern computers will make realistic 3D radiative transfer
calculations possible in the near future. Our current code scales to
very large numbers of processors, but requires larger memory per
processor at high spatial resolution.
Radiative transfer - Scattering
Peter H. Hauschildt1 and E. Baron1,2,3
Hamburger Sternwarte, Gojenbergsweg 112, 21029 Hamburg, Germany; yeti@hs.uni-hamburg.de - Dept. of Physics and Astronomy, University of Oklahoma, 440 W. Brooks, Rm 100, Norman, OK 73019 USA; baron@ou.edu - Computational Research Division, Lawrence Berkeley National Laboratory, MS 50F-1650, 1 Cyclotron Rd, Berkeley, CA 94720-8139 USA
Received date Accepted date
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