On the Synchrotron Self-Compton Emission from Relativistic Shocks and Its Implications for Gamma-Ray Burst Afterglows

@article{Sari2001OnTS,
  title={On the Synchrotron Self-Compton Emission from Relativistic Shocks and Its Implications for Gamma-Ray Burst Afterglows},
  author={Re’em Sari and Ann Aidle Esin},
  journal={The Astrophysical Journal},
  year={2001},
  volume={548},
  pages={787 - 799}
}
We consider the effects of inverse Compton scattering of synchrotron photons from relativistic electrons in γ-ray burst (GRB) afterglows. We compute the spectrum of the inverse Compton emission and find that it can dominate the total cooling rate of the afterglow for several months or even years after the initial explosion. We demonstrate that the presence of strong inverse Compton cooling can be deduced from the effect it has on the time evolution of the cooling break in the synchrotron… 

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References

SHOWING 1-10 OF 23 REFERENCES

Synchrotron Self-Absorption in Gamma-Ray Burst Afterglow

Gamma-ray burst (GRB) afterglow is reasonably described by synchrotron emission from relativistic blast waves at cosmological distances. We perform detailed calculations taking into account the

Synchrotron and Synchrotron Self-Compton Emission and the Blast-Wave Model of Gamma-Ray Bursts

We investigate the dynamics and radiation from a relativistic blast wave that decelerates as it sweeps up ambient matter. The bulk kinetic energy of the blast-wave shell is converted into internal

Analytic Light Curves of Gamma-Ray Burst Afterglows: Homogeneous versus Wind External Media

Assuming an adiabatic evolution of a gamma-ray burst (GRB) remnant interacting with an external medium, we calculate the injection, cooling, and absorption break frequencies and the afterglow flux

Beaming, Baryon Loading, and the Synchrotron Self-Compton Component in Gamma-Ray Bursts

We present detailed calculations of nonthermal synchrotron and synchrotron self-Compton (SSC) spectra radiated by blast waves that are energized by interactions with a uniform surrounding medium.

Cooling Timescales and Temporal Structure of Gamma-Ray Bursts

A leading mechanism for producing cosmological gamma-ray bursts (GRBs) is via ultrarelativistic particles in an expanding fireball. The kinetic energy of the particles is converted into thermal

Diverse Temporal Properties of Gamma-Ray Burst Afterglows

The detection of delayed X-ray, optical, and radio emission, the "afterglow" associated with gamma-ray bursts (GRBs), is consistent with fireball models, in which the emission is produced by a

Spectral Energy Distributions of Gamma-Ray Bursts Energized by External Shocks

Sari, Piran, & Narayan have derived analytic formulae to model the spectra from gamma-ray burst blast waves that are energized by sweeping up material from the surrounding medium. We extend these

The Soft X-Ray Afterglow of Gamma-Ray Bursts: A Stringent Test for the Fireball Model

I consider the recent discovery of a soft X-ray source inside the error box of the gamma-ray burst GB 960720 by the SAX, ASCA, and ROSAT satellites, in terms of the fireball model. I show that the

Spectra and Light Curves of Gamma-Ray Burst Afterglows

The recently discovered gamma-ray burst afterglow is believed to be described reasonably well by synchrotron emission from a decelerating relativistic shell that collides with an external medium. To

Physical Parameters of GRB 970508 and GRB 971214 from Their Afterglow Synchrotron Emission

We have calculated synchrotron spectra of relativistic blast waves and find predicted characteristic frequencies that are more than an order of magnitude different from previous calculations. For the