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Explosive Nucleosynthesis in Aspherical Hypernova Explosions and Late Time Spectra of SN1998bw
K. Maeda, T. Nakamura, K. Nomoto +3
Aspherical explosion models for the hypernova (hyper-energetic supernova) SN 1998bw are presented. Nucleosynthesis in aspherical explosions is examined with a two-dimensional hydro…
The fading of SN 1997D
S. Benetti, M. Turatto, S. Balberg +7
We present a new set of spectroscopic and photometric data extending the observations of SN 1997D to over 400 days after the explosion. These observations confirm the peculiar prop…
Can differences in the nickel abundance in Chandrasekhar mass models explain the relation between brightness and decline rate of normal Type Ia Supernovae?
Paolo A. Mazzali, Ken'ichi Nomoto, Enrico Cappellaro +3
The use of Type Ia supernovae as distance indicators relies on the determination of their brightness. This is not constant, but it can be calibrated using an observed relation betw…
On the presence of Silicon and Carbon in the pre-maximum spectrum of the Type Ia SN 1990N
Paolo A. Mazzali
The spectrum of the normal Type Ia SN 1990N observed very early on (14 days before B maximum) was analysed by Fisher et al (1997), who showed that the large width and the unusual p…
A Spectroscopic Analysis of the Energetic Type Ic `Hypernova' SN 1997ef
Paolo A. Mazzali, Koichi Iwamoto, Ken'ichi Nomoto
The properties of the bright and energetic Type Ic SN 1997ef are investigated using a Monte Carlo spectrum synthesis code. Analysis of the earliest spectra is used to determine the…
Light Curve and Spectral Models for the Hypernova SN 1998bw associated with GRB980425
Takayoshi Nakamura, Paolo A. Mazzali, Ken'ichi Nomoto +1
A refined model for the unusual Type Ic supernova 1998bw, discovered as the optical counterpart of GRB980425, is presented, and synthetic light curves and spectra are compared with…