paper

Simulations of Gamma-Ray Bursts from External Shocks: Time Variability and Spectral Correlations

arXiv:astro-ph/9703187 · doi:10.1086/305056

Abstract

We compute burst spectra and time structures arising from synchrotron and inverse Compton scattering by non-thermal electrons accelerated in shocks which form during the interaction between a thin ultra-relativistic fireball and a stationary external medium. We investigate the effect of varying the most important model parameters on the resulting burst spectra, and we present a set of correlations among the spectral and temporal features of the bursts. The spectral hardness, various spectral-temporal correlations and the spectral evolution of the simulated bursts are compared to those of observed bursts for a representative set of model parameters. Multi-pulse structures are simulated using a variable magnetic field and anisotropic emission, and the most important spectral and temporal properties of these pulses are compared with observations.

AAS macro aaspp4.sty and psfig.tex (version 1.9) used, 19 pages and 7 figures, ApJ in press. Minor changes relative to the 2nd version. Most changes relative to the 1st version are in section 2 (analytic results)

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