Results of Supernovae sample studies and its implications for theoretical modeling

ABSTRACT:

Supernovae (SNe) explosions mark the explosive death of a star. They are classified empirically based on their observed spectral and light curve features. These features can be connected to the progenitor star to derive pre-explosion characteristics. Some of the pre-explosion characteristics are straight-forward (e.g: if there is hydrogen in the spectra, the progenitor star should have retained its hydrogen layers during its whole evolution). Some are derived through theoretical models (e.g: if the spectra shows broad and boxy hydrogen lines without absorption components, it is possibly due to interaction of the SNe ejecta with a dense shell formed by circumstellar material accumulated during the explosion). Theoretical models are not only useful to infer progenitor properties but also to predict what type of compact remnant will be produced by the explosion, if any. Thus, SNe characterization is of key importance to understand both stellar evolution and  the birth of compact objects. In this talk I will present the observational analysis done in samples of different types of SNe and the implications of the results for theoretical models. I will finish by presenting the possibilities and challenges that the new LSST survey presents for the field.