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What Are Gamma-Ray Bursts?$
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Joshua S. Bloom

Print publication date: 2011

Print ISBN-13: 9780691145570

Published to Princeton Scholarship Online: October 2017

DOI: 10.23943/princeton/9780691145570.001.0001

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The Progenitors of Gamma-Ray Bursts

The Progenitors of Gamma-Ray Bursts

(p.135) 5 The Progenitors of Gamma-Ray Bursts
What Are Gamma-Ray Bursts?

Joshua S. Bloom

Princeton University Press

This chapter discusses the object or objects responsible for gramma-ray bursts (GRBs). Until now, there are few absolute certainties with regard to the progenitors of GRBs. One clear standout is the progenitors of soft gamma-ray repeaters (SGRs) which are very obviously neutron stars. There are a number of corroborating lines of evidence for this progenitor association: (1) some well-localized SGRs are associated with supernova remnants, suggesting they are byproducts of recent supernovae; (2) there is quiescent X-ray emission from the sites of SGRs, similar to a class of neutron stars called “anomalous X-ray pulsars”; (3) Galactic SGRs tend to be found in the Galactic plane, where most young neutron stars reside; and (4) the ringdown emission after SGR pulses is periodic, with periods comparable to that of slowly rotating neutron stars (few seconds).

Keywords:   gamma-ray bursts, GRBs, progenitors, soft Gamma-ray Repeaters, neutron stars, anomalous X-ray pulsars, X-ray emission, supernova

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