AbstractWe consider the temporal behaviour and spectra of early X-ray afterglows of Gamma-Ray Bursts (GRBs) and identify peculiarities imprinted by dynamcal processes in GRB shocks. It is shown that the bolometric lightcurve may deviate from monotonous decline when the late-time energy injection takes place via a secondary shock. The latter is formed by a neutron component of outflow, which is present in any stellar-type GRB model and carry as much energy as the proton component. Kinetic processes in the emitting region give rise to a break in the spectrum of X-ray emission of synchrotron origin related to a break in the electron distribution function, which appears due to transition from synchrotron cooling (for the most energetic electrons) to Compton cooling (for less energetic ones). The new generation of X-ray missions with greatly enhanced sensitivity offers a breakthrough in understanding of dynamics of early GRB afterglows.
Lightcurves and spectral features of X-ray afterglows of gamma-ray bursts
Advances in Space Research ; 32 , 10 ; 2039-2044
2003-01-01
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Lightcurves and Spectral Features of X-Ray Afterglows of Gamma-Ray Bursts
British Library Conference Proceedings | 2003
|Lightcurves and spectral features of X-ray afterglows of gamma-ray bursts
Online Contents | 2003
|Online Contents | 2007
|Elsevier | 2007
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