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Gamma-ray Bursts Progress and Problems

Published online by Cambridge University Press:  23 June 2017

N. R. Tanvir
N. R. Tanvir*
Affiliation:
University of Leicester, Department of Physics and Astronomy, University Road, Leicester, LE1 7RH, United Kingdom email: [email protected]
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Abstract

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Our understanding of gamma-ray bursts (GRBs) has come a long way in the past fifty years since their first detection. We now know that GRBs arise in distant galaxies and that there are at least two distinct sub-classes, the long-duration class being produced by some rare massive star core collapse and the short-duration class likely by compact binary mergers involved neutron stars. In both cases, the final remnant will be a stellar-mass black-hole or a massive neutron star. The bursts themselves are associated with ultra-relativistic jetted outflows created by these events, and their afterglows by the impact of these outflows on the surrounding circumburst material. Increasingly GRBs are also being used as probes of the universe, both for understanding galaxy evolution back to the era of reionization, and for the physics of gravitational wave sources. However, many aspects of GRBs remain poorly understood, some pointers to which are given here.

Keywords

gamma rays: burstsgalaxies: high-redshiftgalaxies: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S324: New Frontiers in Black Hole Astrophysics , September 2016 , pp. 49 - 53
Copyright
Copyright © International Astronomical Union 2017 

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