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The Radio Properties of Type Ibc Supernovae

Soderberg, Alicia M. (2007) The Radio Properties of Type Ibc Supernovae. In: Supernova 1987A: 20 Years after Supernovae and Gamma-Ray Bursters, Aspen, CO, 19-23 February 2007. AIP Conference Proceedings. No.937. American Institute of Physics , Melville, NY, pp. 492-499. ISBN 978-0-7354-0448-9.

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Over the past few years, long-duration gamma-ray bursts (GRBs), including the subclass of X-ray flashes (XRFs), have been revealed to be a rare variety of Type Ibc supernova (SN Ibc). While all these events result from the death of massive stars, the electromagnetic luminosities of GRBs and XRFs exceed those of ordinary Type Ibc SNe by many orders of magnitude. The observed diversity of stellar death corresponds to large variations in the energy, velocity, and geometry of the explosion ejecta. Using multi-wavelength (radio, optical, X-ray) observations of the nearest GRBs, XRFs, and SNe Ibc, I show that while GRBs and XRFs couple at least ~10^48 erg to relativistic material, SNe Ibc typically couple <~10^48 erg to their fastest (albeit non-relativistic) outflows. Specifically, I find that less than 3% of local SNe Ibc show any evidence for association with a GRB or XRF Recently, a new class of GRBs and XRFs has been revealed which are under-luminous in comparison with the statistical sample of GRBs. Owing to their faint high-energy emission, these sub-energetic bursts are only detectable nearby (z<~0.1) and are likely 10 times more common than cosmological GRBs. In comparison with local SNe Ibc and typical GRBs/XRFs, these explosions are intermediate in terms of both volumetric rate and energetics. Yet the essential physical process that causes a dying star to produce a GRB, XRF, or sub-energetic burst, and not just a SN, remains a crucial open question. Progress requires a detailed understanding of ordinary SNe Ibc which will be facilitated with the launch of wide-field optical surveys in the near future.

Item Type:Book Section
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Additional Information:© 2007 American Institute of Physics.
Subject Keywords:supernovae; gamma-ray sources (astronomical); X-rays
Series Name:AIP Conference Proceedings
Issue or Number:937
Record Number:CaltechAUTHORS:SODaipcp07
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9000
Deposited By: Archive Administrator
Deposited On:13 Oct 2007
Last Modified:02 Oct 2019 23:56

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