Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 2B038

X-ray Radiative Transfer in Protoplanetary Disks with ProDiMo

Rab, Christian (Department of Astrophysics, University of Vienna)
Woitke, Peter (SUPA, School of Physics & Astronomy, University of St. Andrews)
Güdel, Manuel (Department of Astrophysics, University of Vienna)
Min, Michiel (Astronomical Institute ’Anton Pannekoek’, University of Amsterdam)
DIANA, Team (

X-ray emission is a common property of YSOs. T Tauri stars show X-ray luminosities up to 10^32 erg/s but also Herbig Ae/Be stars can have moderate X-ray emission in the range of 10^28 to 10^31 erg/s. We want to investigate the impact of X-ray radiation on the thermal and chemical structure of protoplanetary discs around these YSOs. Therefore we have added a new X-ray Radiative Transfer module to the radiation thermo-chemical code ProDiMo (Protoplanetary Disc Modeling) extending the existing implementation of X-ray chemistry implemented by Aresu et al. This new module considers gas and dust opacities (including scattering) and a possible X-ray background field. Further we added a new set of FUV - photoreactions to the X-ray chemistry module of ProDiMo as fast electrons created in X-ray ionisation can produce a significant secondary FUV radiation field by exciting atomic or molecular hydrogen. We discuss the importance of these processes on the thermal and chemical structure of the protoplanetary disc, and present them on the basis of a typical T Tauri disc model. This work is performed in the context of the EU FP7-project DIANA (

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