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13 mars 2013 : Presentation of IRIS, a Generic 3D Radiative Transfer Code for Spectral Diagnostics. Application to Radiative shocks



Presentation of IRIS, a Generic 3D Radiative Transfer Code for Spectral Diagnostics. Application to Radiative shocks

par Laurent Ibgui, LERMA , Observatoire de Paris - Meudon

Mercredi 24 avril 2013 à 14h à l'IAS, bât. 121, salle 1-2-3


I will present IRIS, a new generic 3D radiative transfer code devoted to the prediction of high resolution synthetic spectra, for spectral diagnostics. Such a generic tool will provide the scientific community with the capability of relating theoretical Magneto Hydrodynamics or Radiation Hydrodynamics (RMHD) models to their spectral emission, and then to compare theoretical spectra with observations.

I will review the major features of IRIS, such as its capability of handling periodic media, and treating arbitrary velocity fields (no Sobolev approximation). I will also introduce its future extensions that will allow to treat scattering and non-LTE situations.

IRIS has been applied to model radiative shocks, which are a fundamental process of accreting astrophysical objects. In particular, IRIS provides an unprecedented opportunity to test the approximate radiation transport models used in RMHD codes. I will disclose the results of a test of the gray M1 model used by HERACLES code. I will finally display theoretical spectra of radiative shocks, and discuss their angular distribution.