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Hydrogen in Type Ic Supernovae?
David Branch, David J. Jeffery, Timothy R. Young +1
By definition, a Type Ic supernova (SN Ic) does not have conspicuous lines of hydrogen or helium in its optical spectrum. SNe Ic usually are modelled in terms of the gravitational…
A Parameter Study of Type II Supernova Light Curves Using 6 M_odot He Cores
Timothy R. Young
Results of numerical calculations of Type II supernova light curves are presented. The model progenitor stars have 6 cores and various envelopes, originating from a num…
The properties of Supernova 1997cy associated to GRB970514
M. Turatto, T. Suzuki, P. A. Mazzali +7
The extraordinary SN 1997cy associated with GRB 970514 has been observed photometrically and spectroscopically for nearly 2 yr. At the time of discovery SN 1997cy was the brightest…
Discovery of the peculiar supernova 1998bw in the error box of GRB980425
T. J. Galama, P. M. Vreeswijk, J. van Paradijs +42
The discovery of X-ray, optical and radio afterglows of gamma-ray bursts (GRBs) and the measurements of the distances to some of them have established that these events come from G…
A `Hypernova' model for SN 1998bw associated with gamma-ray burst of 25 April 1998
K. Iwamoto, P. A. Mazzali, K. Nomoto +24
The discovery of the peculiar supernova (SN) 1998bw and its possible association with the gamma-ray burst (GRB) 980425 provide new clues to the understanding of the explo…
The Peculiar Type II Supernova 1997 D: A Case for a Very Low 56Ni Mass
M. Turatto, P. A. Mazzali, T. R. Young +14
SN 1997D in NGC 1536 is possibly the least luminous and energetic Type II supernova discovered to date. The entire light curve is subluminous, never reaching . The ra…