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Supernovae and Gamma-ray Bursts

Published online by Cambridge University Press:  05 September 2012

Paolo A. Mazzali
Paolo A. Mazzali*
Affiliation:
INAF - Osservatorio Astronomico di Padova, Padova, Italy Max-Planck Institute for Astrophysics, Garching, Germany
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Abstract

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The properties of the Supernovae discovered in coincidence with long-duration Gamma-ray Bursts and X-Ray Flashes are reviewed, and compared to those of SNe for which GRBs are not observed. The SNe associated with GRBs are of Type Ic, they are brighter than the norm, and show very broad absorption lines in their spectra, indicative of high expansion velocities and hence of large explosion kinetic energies. This points to a massive star origin, and to the birth of a black hole at the time of core collapse. There is strong evidence for gross asymmetries in the SN ejecta. The observational evidence seems to suggest that GRB/SNe are more massive and energetic than XRF/SNe, and come from more massive stars. While for GRB/SNe the collapsar model is favoured, XRF/SNe may host magnetars.

Keywords

supernovae: generalsupernovae: individual (SN 1997ef, 1998bw, 2002ap, 2003dh, 2003jd, 2005bf, 2006aj, 2008D)gamma rays: burstsradiation mechanisms: generalline: formationnuclear reactionsnucleosynthesisabundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S279: Death of Massive Stars: Supernovae and Gamma-Ray Bursts , April 2011 , pp. 75 - 82
Copyright
Copyright © International Astronomical Union 2012

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