Studying Type Ia Supernovae Progenitor Parameters

We analyze large sets of light curve data, study intrinsic primary parameter variations and obtain secondary parameter variations using monochromatic differential analysis for SNe Ia. We remap inhomogeneous data sets into a homogeneous data set centered in time and magnitude space and get the external, primary and secondary LC parameters of individual objects. We use photometry of SNe Ia observed  by Carnegie Supernova Project and investigate the presence of model based differential LC signatures of main sequence mass variation of progenitor stars, central density variation of the WD and metallicity variation in the progenitors. The V band gives the highest accuracy in the calculations, is insensitive to metallicity and also the most stable for differential creation, as the differentials are stable with respect to the uncertainties in the primary parameters of SNe pairs. Our analysis reduces the residuals from 0.2^m to 0.02^m . Most of the SNe in our sample have main sequence masses in the upper range of the possible main sequence mass value for SNe Ia progenitors. This indicates that  progenitor properties put constrains on the delay time of the star formation. The central density distribution shows that the SNe originates from progenitors with a wide range of central densities.