Gamma ray bursts from superconducting cosmic strings - art. no. 043004

Citation
V. Berezinsky et al., Gamma ray bursts from superconducting cosmic strings - art. no. 043004, PHYS REV D, 6404(4), 2001, pp. 3004
Citations number
59
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
05562821 → ACNP
Volume
6404
Issue
4
Year of publication
2001
Database
ISI
SICI code
0556-2821(20010815)6404:4<3004:GRBFSC>2.0.ZU;2-7
Abstract
Cusps of superconducting strings can serve as GRB engines. A powerful beame d pulse of electromagnetic radiation from a cusp produces a jet of accelera ted particles. whose propagation is terminated by the shock responsible for GRB. A single free parameter, the string scale of symmetry breaking eta si milar to 10(14) GeV, together with reasonable assumptions about the magnitu de of cosmic magnetic fields and the fraction of volume that they occupy, e xplains the GRB rate, duration, and fluence, as well as the observed ranges of these quantities. The wiggles on the string can drive the short-time st ructures of GRB. This model predicts that GRBs are accompanied by strong bu rsts of gravitational radiation which should be detectable by LIGO, VIRGO, and LISA detectors. Another prediction is the diffuse x- and gamma-ray radi ation at 8 MeV-100 GeV with a spectrum and flux comparable to the observed. The weakness of the model is the prediction of too low a rate of GRBs from galaxies, as compared with observations. This suggests that either the cap ture rate of string loops by galaxies is underestimated in our model or tha t GRBs from cusps are responsible for only a subset of the observed GRBs no t associated with galaxies.