• Corpus ID: 119434146

Modeling the Multi-band Afterglow of GRB 060908 with the Double Power-Law Hard Electron Energy Spectrum Model

@article{Zhang2018ModelingTM,
  title={Modeling the Multi-band Afterglow of GRB 060908 with the Double Power-Law Hard Electron Energy Spectrum Model},
  author={Q. Zhang and Shaolin Xiong and Liming Song},
  journal={arXiv: High Energy Astrophysical Phenomena},
  year={2018}
}
Electrons accelerated in relativistic collisionless shocks are usually assumed to follow a power-law energy distribution with an index of $p$. Observationally, although most gamma-ray bursts (GRBs) have afterglows that are consistent with $p>2$, there are still a few GRBs suggestive of a hard ($p 2$ and an injection break assumed as $\gamma_{\rm b}\propto \gamma^{q}$ in the relativistic regime. Moreover, these works suggested a possibly universal value of $q\sim0.5$. GRB~060908 is another case… 

References

Evolution of an afterglow with a hard electron spectrum

Diffusive shock acceleration theory suggests that the ``universal'' energy spectrum of electrons with a power-law index p approximately equal to 2.3, commonly used to model GRB afterglows, cannot