Synthetic Spectra for Type Ia Supernovae at Early Epochs

  • D.N. Sauer
  • A.W.A. Pauldrach
  • T. Hoffmann
  • W. Hillebrandt
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 99)


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.


Local Thermodynamic Equilibrium Stellar Atmosphere Synthetic Spectrum Early Epoch Maximum Light 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    V.N. Gamezo, A.M. Khokhlov, E.S. Oran, A.Y. Chtchelkanova, R.O. Rosenberg: Science 299, 77 (2003)CrossRefADSGoogle Scholar
  2. 2.
    P. Höflich, C.L. Gerardy, R.A. Fesen, S. Sakai: Astrophys. J. 568, 791 (2002)CrossRefADSGoogle Scholar
  3. 3.
    E.J. Lentz, E. Baron, D. Branch, P. Hauschildt: Astrophys. J. 557, 266 (2001)CrossRefADSGoogle Scholar
  4. 4.
    K. Nomoto, F. Thielemann, K. Yokoi: Astrophys. J. 286, 644 (1984)CrossRefADSGoogle Scholar
  5. 5.
    P. Nugent, E. Baron, D. Branch, A. Fisher, P.H. Hauschildt: Astrophys. J. 485, 812 (1997)CrossRefADSGoogle Scholar
  6. 6.
    A.W.A. Pauldrach, M. Duschinger, P.A. Mazzali, J. Puls, M. Lennon, D. Miller: Astron. Astrophys. 312, 525 (1996)ADSGoogle Scholar
  7. 7.
    A.W.A. Pauldrach, T.L. Hoffmann, M. Lennon: Astron. Astrophys. 375, 161 (2001)CrossRefADSGoogle Scholar
  8. 8.
    A.W.A. Pauldrach: astro-ph 0202226 (2003)Google Scholar
  9. 9.
    M. Reinecke, W. Hillebrandt, J.C. Niemeyer: Astron. Astrophys. 391, 1167 (2002)CrossRefADSGoogle Scholar
  10. 10.
    D. Sauer, A.W.A. Pauldrach: “Model atmospheres for type Ia supernovae: basic steps towards realistic synthetic spectra.” In: Nuclear Astrophysics, ed. W. Hillebrandt, E. Müller (MPA Proc., 2002) p. 48Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • D.N. Sauer
    • 1
  • A.W.A. Pauldrach
    • 2
  • T. Hoffmann
    • 2
  • W. Hillebrandt
    • 1
  1. 1.Max-Planck-Institut für AstrophysikGarchingGermany
  2. 2.Institut für Astronomie und Astrophysik der Universität MünchenGermany

Personalised recommendations