History of the DIRTY Model

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The DIRTY started as a FORTRAN code which computed Monte Carlo radiative transfer through spherically symmetric dust distributions back when Karl Gordon was a graduate student at the Univ. of Toledo under the instruction of Adolf Witt. In this form, it was modified to compute the radiative transfer through non-symmetric dust distributions. After a few years of frustration at revising the FORTRAN code, the model was translated to C++ code making it much easier to maintain and improve the DIRTY model. The next stage in the model developement was to add the ability to compute the radiative transfer through a clumpy dust distribution. This was the first time such calculations were done in a 3D geometry for realistic interstellar dust.

After Karl Gordon moved to Louisiana State Univ. the next main improvement to the model was the addition of the ability to compute the dust re-emission spectrum self consistantly with the radiative trasfer. This was part of Karl Misselt's PhD thesis and represented a major step forward for the DIRTY model. Karl Gordon then moved to the Univ. of Arizona and added the ability to compute the polarization from dust scattering to the model. Karl Misselt moved to Goddard Space Flight Center, where he significantly improved the speed of the dust reemission portion of the code. Karl Misselt then moved to the Univ. of Arizona.

Both Karls plan on continuing to improve the DIRTY model. Current plans include continuing improvements in the speed of the dust reemission and the ability to use an adaptive grid for the dust distribution.

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Papers which describe or use the DIRTY model include

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