%0 Generic %1 Roellig2007 %A Roellig, M. %A Abel, N. P. %A Bell, T. %A Bensch, F. %A Black, J. %A Ferland, G. J. %A Jonkheid, B. %A Kamp, I. %A Kaufman, M. J. %A Bourlot, J. Le %A Petit, F. Le %A Meijerink, R. %A Morata, O. %A Ossenkopf, V. %A Roueff, E. %A Shaw, G. %A Spaans, M. %A Sternberg, A. %A Stutzki, J. %A Thi, W. F. %A van Dishoeck, E. F. %A van Hoof, P. A. M. %A Viti, S. %A Wolfire, M. G. %D 2007 %K PDR code %T A PDR-Code Comparison Study %U http://arxiv.org/abs/astro-ph/0702231 %X We present a comparison between independent computer codes, modeling the physics and chemistry of interstellar photon dominated regions (PDRs). Our goal was to understand the mutual differences in the PDR codes and their effects on the physical and chemical structure of the model clouds, and to converge the output of different codes to a common solution. A number of benchmark models have been created, covering low and high gas densities and far ultraviolet intensities. The benchmark models were computed in two ways: one set assuming constant temperatures, thus testing the consistency of the chemical network and photo-processes, and a second set determining the temperature selfconsistently. We investigated the impact of PDR geometry and agreed on the comparison of results from spherical and plane-parallel PDR models. We identified a number of key processes governing the chemical network which have been treated differently in the various codes, and defined a proper common treatment. We established a comprehensive set of reference models for ongoing and future PDR model bench-marking and were able to increase the agreement in model predictions for all benchmark models significantly.

@misc{Roellig2007, abstract = { We present a comparison between independent computer codes, modeling the physics and chemistry of interstellar photon dominated regions (PDRs). Our goal was to understand the mutual differences in the PDR codes and their effects on the physical and chemical structure of the model clouds, and to converge the output of different codes to a common solution. A number of benchmark models have been created, covering low and high gas densities and far ultraviolet intensities. The benchmark models were computed in two ways: one set assuming constant temperatures, thus testing the consistency of the chemical network and photo-processes, and a second set determining the temperature selfconsistently. We investigated the impact of PDR geometry and agreed on the comparison of results from spherical and plane-parallel PDR models. We identified a number of key processes governing the chemical network which have been treated differently in the various codes, and defined a proper common treatment. We established a comprehensive set of reference models for ongoing and future PDR model bench-marking and were able to increase the agreement in model predictions for all benchmark models significantly. }, added-at = {2011-03-18T05:56:53.000+0100}, author = {Roellig, M. and Abel, N. P. and Bell, T. and Bensch, F. and Black, J. and Ferland, G. J. and Jonkheid, B. and Kamp, I. and Kaufman, M. J. and Bourlot, J. Le and Petit, F. Le and Meijerink, R. and Morata, O. and Ossenkopf, V. and Roueff, E. and Shaw, G. and Spaans, M. and Sternberg, A. and Stutzki, J. and Thi, W. F. and van Dishoeck, E. F. and van Hoof, P. A. M. and Viti, S. and Wolfire, M. G.}, biburl = {https://www.bibsonomy.org/bibtex/2fe5fdc024d32e691012c0fda450cdc3a/miki}, description = {[astro-ph/0702231] A PDR-Code Comparison Study}, interhash = {17e4aee1d078aa9d558e3142bde8ba3c}, intrahash = {fe5fdc024d32e691012c0fda450cdc3a}, keywords = {PDR code}, note = {cite arxiv:astro-ph/0702231 Comment: 28 pages, 16 figures, see all benchmark data under: http://www.ph1.uni-koeln.de/pdr-comparison}, timestamp = {2011-03-18T05:56:53.000+0100}, title = {A PDR-Code Comparison Study}, url = {http://arxiv.org/abs/astro-ph/0702231}, year = 2007 }