The physical source of gamma-ray bursts

Details The physical source of gamma-ray bursts The physical source of gamma-ray bursts

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aipc..428..830k&link_type=abstract

Fourth Huntsville gamma-ray burst symposium. AIP Conference Proceedings, Volume 428, pp. 830-833 (1998).

Mathematics

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Gamma-Ray Sources, Gamma-Ray Bursts, Radiation Mechanisms, Polarization, Neutron Stars

Scientific paper

Gamma-ray bursts are thought to come from a relativistic blast-wave emitting gamma-rays at a distance of 10 to 1000 AU from the central engine which releases the explosive energy. To account for the observed duration and variability of GRBs, the central engine powering the γ-ray emission must be active from several to many seconds and yet must strongly fluctuate in its output on much shorter timescales. A differentially rotating neutron star of millisecond period and canonical magnetization (DROMP) will wind up a toroidal magnetic field of >1016 G and then will release its magnetic energy, E~1051 erg, in a rapid sub-burst. This process will repeat on a timescale of t~1 to 103 s (depending on the initial conditions) until the kinetic energy of differential rotation is exhausted after several (N) sub-bursts. The calculated values E, t, N are in agreement with observations. The baryon loading in each sub-burst was found to be also in agreement with theoretical requirements for cosmological GRBs. DROMPs would be expected to be created in several kinds of astrophysical events, at least two of which would be expected to occur at the apparent GRB rate of ~10-6 y-1 per galaxy. Some DROMPs could be created close to, while others far from, galaxies.

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