3D non-LTE spectrum synthesis for Type Ia supernovae

Details 3D non-LTE spectrum synthesis for Type Ia supernovae 3D non-LTE spectrum synthesis for Type Ia supernovae

2009-06-15

arxiv.org/abs/0906.2764v1

AIP Conf.Proc.1111:277-280,2009

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages, 1 figure, presented at the conference "Probing Stellar Populations out to the Distant Universe" (Cefalu, Italy, Sept.

Scientific paper

10.1063/1.3141559

Despite the importance of Type Ia supernovae as standard candles for cosmology and to the chemical evolution of the Universe, we still have no consistent picture of the nature of these events. Much progress has been made in the hydrodynamical explosion modelling of supernovae Ia in the last few years and fully 3-D explosion models are now available. However those simulations are not directly comparable to observations: to constrain explosion models, radiative transfer calculations must be carried out. We present a new 3-D Monte Carlo radiative transfer code which allows forward modelling of the spectral evolution of Type Ia supernovae from first principles, using hydrodynamical explosion models as input. Here, as a first application, we calculate line-of-sight dependent colour light curves for a toy model of an off-centre explosion.

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