Energy and Radiation Spectrum of Electrons in Ultra-relativistic Shocks of GRB Afterglows

Details Energy and Radiation Spectrum of Electrons in Ultra-relativistic Shocks of GRB Afterglows Energy and Radiation Spectrum of Electrons in Ultra-relativistic Shocks of GRB Afterglows

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003basi...31..353r&link_type=abstract

Bulletin of the Astronomical Society of India, vol. 31, p.353-355

Astronomy and Astrophysics

Astronomy

Grb Afterglow, Spectral Index, Particle Acceleration

Scientific paper

We consider particle acceleration near ultra relativistic shocks (shock p 1) and the distribution of accelerated particles in the shock downstream. We suggest that the electron energy spectrum will settle mp into an "universal" power law with index p 2.2 above an "injection break" at e = i m shock, and e will be flatter at lower energies. The synchrotron radiation spectrum arising from these electrons is computed for a decelerating relativistic fireball. We show that this model can account well for the observed spectra and lightcurves of Gamma Ray Burst Afterglows.

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