Physics
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...9e..14l&link_type=abstract
Supernovae: One Millennium After SN1006, 26th meeting of the IAU, Joint Discussion 9, 17-18 August 2006, Prague, Czech Republic,
Physics
Scientific paper
The explosion characteristics of supernovae are investigated through a detailed study of the bolometric light curves. The governing factors for the light curve shapes are the total amount of synthesized ^56Ni, the gamma-ray opacity, the total mass in the ejecta and the explosion energy. We have determined the nickel mass, the ejecta mass as functions of the opacity and the explosion energy, as expressed through the expansion velocity for a small sample of well-observed Type Ia Supernovae (SNe Ia). We find that the current models have difficulty to produce the nickel mass we derive for many SNe Ia. There is also a wide range of nickel mass produced in these explosions. We use simple arguments to derive a lower limit for the Hubble constant of 50 km s^-1 Mpc^-1. The late decline rates are used to estimate the total ejecta mass of SNe Ia. Again, there is a rather large range of ejecta masses we derive. None of our objects shows the canonical Chandrasekhar mass typically assumed for these explosions.
Leibundgut Bruno
Stritzinger Maximilian
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