A Comparative Study of the Spectra of Type Ia Supernovae

University Of Oklahoma Norman Campus, Norman OK

Investigators

Abstract

AST-0506028 David Branch University of Oklahoma Norman Campus A Comparative Study of the Spectra of Type Ia Supernovae ABSTRACT A comprehensive comparative study of the spectra of Type Ia supernovae (a critical distance indicator on cosmological scales) will be carried out. The specific goal is a consistent quantification of the differences among these supernovae (including reliable line identifications) to reveal the range and distribution of their spectroscopic properties. Of particular interest is whether they form a continuous spread of sub-types or break down into distinct subgroups. The analysis will be performed by comparing observed supernovae spectra with the output of a parameterized supernova spectrum synthesis code (Synow) developed at the University of Oklahoma. Secondary goals include a similar study of Type Ic supernovae spectra, using Synow to interpret spectra of quasistellar objects with broad absorption lines, and the further development of the online supernova spectra/photometry database (SUSPECT). Support and training of a graduate student is included and undergraduates will aid in the research effort. The computer program used in the analysis (Synow) will be made available to anyone who wishes to use it. The development and expansion of the SUSPECT online supernovae database will also be continued. A significant component of the work to be performed is also consistent with the joint NSF/NASA/DoE Physics of the Universe strategic plan.