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High-resolution 3D dust radiative transfer in galaxies with DART-Ray

Published online by Cambridge University Press:  09 February 2015

Giovanni Natale ,
Cristina C. Popescu ,
Richard. J. Tuffs ,
Victor P. Debattista  and
Meiert W. Grootes
Giovanni Natale
Affiliation:
Jeremiah Horrocks Institute, University of Central Lancashire, Preston, PR1 2HE, UK Max Planck Institute für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
Cristina C. Popescu
Affiliation:
Jeremiah Horrocks Institute, University of Central Lancashire, Preston, PR1 2HE, UK Max Planck Institute für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
Richard. J. Tuffs
Affiliation:
Max Planck Institute für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
Victor P. Debattista
Affiliation:
Jeremiah Horrocks Institute, University of Central Lancashire, Preston, PR1 2HE, UK
Meiert W. Grootes
Affiliation:
Max Planck Institute für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
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Abstract

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DART-Ray is a 3D ray-tracing dust radiative transfer (RT) code that can be used to derive stellar and dust emission maps of galaxy models and simulations with arbitrary geometries. In addition to the previously published RT algorithm, we have now included in DART-Ray the possibility of calculating the stocastically heated dust emission from each volume element within a galaxy. To show the capabilities of the code, we performed a high-resolution (26 pc) RT calculation for a galaxy N-body+SPH simulation. The simulated galaxy we considered is characterized by a nuclear disc and a flocculent spiral structure. We analysed the derived galaxy maps for the global and local effects of dust on the galaxy attenuation as well as the contribution of scattered radiation to the predicted observed emission. In addition, by performing an additional RT calculation including only the stellar volume emissivity due to young stellar populations (SPs), we derived the contribution to the total dust emission powered by young and old SPs. Full details of this work will be presented in a forthcoming publication.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S309: Galaxies in 3D across the Universe , July 2014 , pp. 333
Copyright
Copyright © International Astronomical Union 2015 

References

Cole, D.et al. 2014, submittedGoogle Scholar
Natale, G., Popescu, C. C., Tuffs, R. J., & Semionov, D. 2014, MNRAS, 438, 3137Google Scholar
Natale, G.et al. 2014, in prep.Google Scholar
Popescu, C. C., Tuffs, R. J., Dopita, M. A., Fischera, J., et al. 2011, A&A, 527, 109Google Scholar