Synchrotron radiation of the beamed particles and the spectral variability of gamma-ray bursts

Details Synchrotron radiation of the beamed particles and the spectral variability of gamma-ray bursts Synchrotron radiation of the beamed particles and the spectral variability of gamma-ray bursts

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992acasn..33..309z&link_type=abstract

Acta Astronomica Sinica (ISSN 0001-5245), vol. 33, no. 3, p. 309-315.

Astronomy and Astrophysics

Astronomy

Gamma Ray Bursts, Gamma Ray Spectra, Synchrotron Radiation, Continuous Spectra, Magnetic Field Configurations, Magnetic Field Reconnection, Particle Beams, Relativistic Electron Beams

Scientific paper

In this article, magnetic reconnection caused by the instability of neutron star magnetospheres has been proposed as the electron acceleration mechanism in gamma-ray bursts (GRBs). The beamed relativistic electrons accelerated directly by the acceleration mechanism impulsively eject from the magnetic reconnection region approximately in the line of the magnetic field direction. These electrons emit photons through synchrotron radiation and lose energy. The synchrotron radiation spectrum has been calculated, including the radiation loss. This kind of spectrum form is different from the known form of synchrotron radiation and satisfactorily fits the three successive continuum spectra and the time evolution of N14 (150-700KeV)/N13 (40-180KeV) in GB820828 showing remarkable spectral variability. Also, the radiation mechanism can reasonably explain the common characteristics, i.e., the absorption and emission features only appear at the beginning of GRBs with fast spectral variability.

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