Consistent estimates of Ni yields for type Ia supernovae
Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark e-mail: firstname.lastname@example.org
2 Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85741 Garching bei München, Germany
3 INAF - OATs, via Tiepolo, 11, 34131 Trieste, Italy e-mail: email@example.com
4 Stockholm Observatory, AlbaNova, Department of Astronomy, 106 91 Stockholm, Sweden e-mail: firstname.lastname@example.org
5 INAF - Osservatorio Astronomico di Padova, vicolo dell'Osservatorio 5, 35122 Padova, Italy e-mail: email@example.com
Accepted: 4 September 2006
Aims.We present mass estimates for seventeen well-observed type Ia supernovae determined by two independent methods.
Methods.Estimates of the mass for each type Ia supernova are determined from (1) modeling of the late-time nebular spectrum and (2) through the combination of the peak bolometric luminosity with Arnett's rule. The attractiveness of this approach is that the comparison of estimated masses circumvents errors associated with the uncertainty in the adopted values of reddening and distance.
Results.We demonstrate that these two methods provide consistent estimates of the amount of synthesized. We also find a strong correlation between the derived mass and the absolute B-band magnitude (MB).
Conclusions.Spectral synthesis can be used as a diagnostic to study the explosion mechanism. By obtaining more nebular spectra the –MB correlation can be calibrated, and be used to investigate any potential systematic effects this relationship may have upon the determination of cosmological parameters, and provide a new manner to estimate extra-galactic distances of nearby type Ia supernovae.
Key words: stars: supernovae: general
© ESO, 2006