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Synthetic Spectra for Type Ia Supernovae at Early Epochs

Published online by Cambridge University Press:  19 September 2016

D.N. Sauer ,
A.W.A. Pauldrach ,
T. Hoffmann  and
W. Hillebrandt
D.N. Sauer
Affiliation:
Max-Planck-Institut für Astrophysik, Garching, Germany;dsauer@mpa-garching.mpg.de, wfh@mpa-garching.mpg.de
A.W.A. Pauldrach
Affiliation:
Institut für Astronomie und Astrophysik der Universität München, Germany;uh10107@usm.uni-muenchen.de, hoffmann@usm.uni-muenchen.de
T. Hoffmann
Affiliation:
Institut für Astronomie und Astrophysik der Universität München, Germany;uh10107@usm.uni-muenchen.de, hoffmann@usm.uni-muenchen.de
W. Hillebrandt
Affiliation:
Max-Planck-Institut für Astrophysik, Garching, Germany;dsauer@mpa-garching.mpg.de, wfh@mpa-garching.mpg.de

Summary

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We present the current status of our construction of synthetic spectra for type Ia supernovae. These properly take into account the effects of NLTE and an adequate representation of line blocking and blanketing. The models are based on a sophisticated atomic database. We show that the synthetic spectrum reproduces the observed spectrum of ‘normal’ SN-Ia near maximum light from the UV to the near-IR. However, further improvements are necessary before truly quantitative analyses of observed SN-Ia spectra can be performed. In particular, the inner boundary condition has to be fundamentally modified. This is due to the dominance of electron scattering over true absorption processes coupled with the flat density structure in these objects.

Type
Part IV Supernovae: Models
Information
International Astronomical Union Colloquium , Volume 192: Cosmic Explosions , 2005 , pp. 327 - 332
Copyright
Copyright © Springer-Verlag 2005

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