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On the Central Engine of Short Gamma-ray Bursts

  • Stephan Rosswog
  • Enrico Ramírez-Ruiz
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 99)

Summary

We assess the ability of neutron star binary coalescence to produce short gamma-ray bursts (GRBs). We find that the neutrino annihilation above the merged remnant will drive bipolar, relativistic jets along the initial binary rotation axis. This outflow can be collimated by the energetic, neutrino-driven baryonic wind that is blown off the remnant. Despite the narrow neutron star mass distribution the apparent luminosities will be spread over a broad range from ∼ 1049 to ∼ 1052 erg s−1, typical jet opening half-angles are around 5 degrees. If the central core of the merger remnant does not collapse immediately convective dynamo action will set in and the available kinetic energy can be transformed into magnetic fields in excess of 1017 G. The corresponding spin-down time scale is ∼ 0.2 s, just about the duration of a short GRB.

Keywords

Neutron Star Isotropic Energy Neutrino Emission Central Engine Short GRBs 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Stephan Rosswog
    • 1
  • Enrico Ramírez-Ruiz
    • 2
  1. 1.Dept. Physics & AstronomyUniversity of LeicesterLeicesterUK
  2. 2.Institute of AstronomyCambridgeUK

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