The Electromagnetic Model of Gamma ray Bursts

Details The Electromagnetic Model of Gamma ray Bursts The Electromagnetic Model of Gamma ray Bursts

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..836..483l&link_type=abstract

GAMMA-RAY BURSTS IN THE SWIFT ERA: Sixteenth Maryland Astrophysics Conference. AIP Conference Proceedings, Volume 836, pp. 483-

Astronomy and Astrophysics

Astrophysics

1

Gamma-Ray Sources, Gamma-Ray Bursts, Stellar Rotation

Scientific paper

The electromagnetic model assumes that rotational energy of a relativistic, stellar-mass central source (black-hole-accretion disk system or fast rotating neutron star) is converted into magnetic energy through unipolar dynamo mechanism, propagated to large distances in a form of relativistic, subsonic, Poynting flux-dominated wind and is dissipated directly into emitting particles through current-driven instabilities. Collimating effects of magnetic hoop stresses lead to strongly non-spherical expansion and formation of jets. Long and short GRBs may develop in a qualitatively similar way, except that in case of long burst ejecta expansion has a relatively short, non-relativistic, strongly dissipative stage inside the star.

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