Parameter sensitivity of synthetic spectra and light curves of Type Ia supernovae

In this doctoral project a systematic sensitivity study on type Ia supernova light curve simulations was pursued.

The spectra and light curves were computed using the high performance atmosphere code PHOENIX. The radiative transfer equation was solved in 1D along characteristic rays in spherical symmetry including full special relativity, taking into account effects of homologous expansion, adiabatic cooling, gamma-ray deposition due to the decay of 56Ni, and the interaction of the radiation with the ejecta.

The results show the influence of the particular model parameters on the simulation results. The different characteristics of the behavior of type 1 SN can be explained. This study is preliminary work for the solution of inverse problems in order to determine the properties of stars from observation data.

Name and contact of project responsible(s):

Dr. Ernst R. Lexen (nterdisciplinary Center for Scientific Computing, Heidelberg University)
Prof. Dr. R. Wehrse 2009 (Institute for Theoretical Astrophysics, Heidelberg University)
Prof. Dr. P. H. Hauschildt (Hamburg Observatory, Hamburg University)
Dr. Stefan Körkel (Interdisciplinary Center for Scientific Computing, Heidelberg University)

Publications:

E. Lexen
Parameter sensitivity of synthetic spectra and light curves of Type Ia supernovae (Dissertation)
Universität Hamburg, 2014, URL: http://ediss.sub.uni-hamburg.de/volltexte/2014/6605/