An external-shock origin of the E p ∝ E 1 / 2 γ relation for Gamma-Ray

@inproceedings{Panaitescu2008AnEO,
  title={An external-shock origin of the E p ∝ E 1 / 2 γ relation for Gamma-Ray},
  author={Alin Panaitescu},
  year={2008}
}
We investigate the possibility that the Ep ∝ E 1/2 γ relation between the peak energy Ep of the νFν spectrum and energy output Eγ for long-duration GRBs arises from the external shock produced by the interaction of a relativistic outflow with the ambient medium. To that aim, we take into account the dependence of all parameters which determine Ep and Eγ on the radial distribution of the ambient medium density and find that the Ep ∝ E 1/2 γ relation can be explained if the medium around GRBs has… CONTINUE READING