# Gamma-ray bursts from synchrotron self-Compton emission

@article{Stern2004GammarayBF,
title={Gamma-ray bursts from synchrotron self-Compton emission},
author={Boris E. Stern and Juri Poutanen},
journal={Monthly Notices of the Royal Astronomical Society},
year={2004},
volume={352}
}
• Published 25 May 2004
• Physics
• Monthly Notices of the Royal Astronomical Society
The emission mechanism of gamma-ray bursts (GRBs) is still a matter of debate. The standard synchrotron energy spectrum of cooling electrons F E E -1/2 is much too soft to account for the majority of the observed spectral slopes. An alternative in the form of quasi-thermal Comptonization in a high-compactness source has difficulties in reproducing the peak of the observed photon distribution below a few hundred keV. We show here that for typical parameters expected in the GRB ejecta the…

## Figures from this paper

Prompt gamma-ray burst emission from gradual energy dissipation
I describe the main aspects of a model for the gamma-ray burst (GRB) emission in which energy is dissipated gradually in a Poynting-flux-dominated flow. In this picture, the energy of the radiating
A marginally fast-cooling proton–synchrotron model for prompt GRBs
• Physics
Monthly Notices of the Royal Astronomical Society
• 2021
A small fraction of gamma-ray bursts (GRBs) with available data down to soft X-rays (∼0.5 keV) has been shown to feature a spectral break in the low-energy part (∼1–10 keV) of their prompt emission
Reconciling observed gamma-ray burst prompt spectra with synchrotron radiation?
• Physics
• 2010
Context. Gamma-ray burst emission in the prompt phase is often interpreted as synchrotron radiation from high-energy electrons accelerated in internal shocks. Fast synchrotron cooling of a power-law
Low-energy Spectra of Gamma-Ray Bursts from Cooling Electrons
• Physics
• 2017
The low-energy spectra of gamma-ray bursts’ (GRBs) prompt emission are closely related to the energy distribution of electrons, which is further regulated by their cooling processes. We develop a
Prompt GRB emission from gradual energy dissipation
I calculate the emission expected from a Poynting-flux-dominated gamma-ray burst (GRB) flow in which energy is dissipated gradually by magnetic reconnection. In this picture, the energy of the
GAMMA-RAY BURSTS FROM MAGNETIZED COLLISIONALLY HEATED JETS
• Physics
• 2011
Jets producing gamma-ray bursts (GRBs) are likely to carry a neutron component that drifts with respect to the proton component. The neutron–proton collisions strongly heat the jet and generate
Detection of Low-energy Breaks in Gamma-Ray Burst Prompt Emission Spectra
• Physics
• 2017
The radiative process responsible for gamma-ray burst (GRB) prompt emission has not been identified yet. If dominated by fast-cooling synchrotron radiation, the part of the spectrum immediately below
Stochastic acceleration model of gamma-ray burst with decaying turbulence
• Physics
• 2015
The spectral shape of the prompt emissions of gamma-ray bursts (GRBs) is typically expressed by the Band function: smooth joining of two power-law functions for high-energy and low-energy regions. To
Simulations of gamma-ray burst afterglows with a relativistic kinetic code
• Physics
• 2014
Aims. This paper introduces a kinetic code that simulates gamma-ray burst (GRB) afterglow emission from the external forward shock and presents examples of some of its applications. One interesting
Prompt high-energy emission from gamma-ray bursts in the internal shock model
• Physics
• 2009
Context. Gamma-ray bursts (GRB) are powerful, short duration events with a spectral luminosity peaking in the keV-MeV (BATSE) range. The prompt emission is thought to arise from electrons accelerated

## References

SHOWING 1-10 OF 31 REFERENCES
Gamma-Ray Bursts from Up-Scattered Self-Absorbed Synchrotron Emission
• Physics
• 2000
We calculate the synchrotron self-Compton emission from internal shocks occurring in relativistic winds as a source of gamma-ray bursts, with allowance for self-absorption. For plausible model
Synchrotron Radiation as the Source of Gamma-Ray Burst Spectra
• Physics
• 2000
We investigate synchrotron emission models as the source of gamma-ray burst (GRB) spectra. We show that including the possibility for synchrotron self-absorption, a "smooth cutoff" to the electron
A γ-ray burst with a high-energy spectral component inconsistent with the synchrotron shock model
• Physics
Nature
• 2003
An observation of a high-energy (multi-MeV) spectral component in the burst of 17 October 1994 that is distinct from the previously observed lower-energy γ-ray component is reported.
Constraints on the emission mechanisms of gamma‐ray bursts
• Physics
• 1999
ABSTRACT If the emission of gamma–ray bursts were due to the synchrotron process in the stan-dard internal shock scenario, then the typical observed spectrum should have a slopeF ν ∝ν −1/2 , which
Quasi-thermal Comptonization and gamma-ray bursts
• Physics
• 1998
Quasi-thermal Comptonization in internal shocks formed between relativistic shells can account for the high-energy emission of gamma-ray bursts. This is in fact the dominant cooling mechanism if the
Synchrotron and Synchrotron Self-Compton Emission and the Blast-Wave Model of Gamma-Ray Bursts
• Physics
• 1998
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
BATSE observations of gamma-ray burst spectra. I: Spectral diversity
• Physics
• 1993
We studied the time-averaged gamma-ray burst spectra accumulated by the spectroscopy detectors of the Burst and Transient Source Experiment. The spectra are described well at low energy by a
On the nature of nonthermal radiation from cosmological gamma-ray bursters
Relativistic electron-positron winds with strong magnetic fields are considered as a source of radiation for cosmological $\gamma$-ray bursters. Such a wind is generated by a millisecond pulsar with
Gamma-ray burst spectra from photon-deficient Compton scattering by nonthermal electrons
• Physics
• 1986
Consideration is given to a model of gamma-ray burst sources based on repeated Compton scatterings of soft photons by relativistic nonthermal electrons. Relativistic electrons which are continuously