Gamma-Ray Bursts at high and very high energies

Abstract

Gamma-Ray Bursts (GRBs) are extra-galactic and extremely energetic transient emissions of gamma rays, which are thought to be associated with the death of massive stars or the merger of compact objects in binary systems. Their huge luminosities involve the presence a newborn stellar-mass black hole emitting a relativistic collimated outflow, which accelerates particles and produces non-thermal emissions from the radio domain to the highest energies. In this article, I review recent progresses in the understanding of GRB jet physics above 100 MeV, based on Fermi observations of bright GRBs. I discuss the physical implications of these observations and their impact on GRB modeling, and I present some prospects for GRB observation at very high energies in the near future.

18 pages, 13 figures -- To be published in a topical review of Comptes Rendus Physique (French Academy of Sciences) on "Gamma-ray Astronomy", Eds. B. Degrange & G. Fontaine

References in corpus (10)

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• A leptonic-hadronic model for the afterglow of gamma-ray burst 090510
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• A very-high-energy component deep in the Gamma-ray Burst afterglow
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• Active galactic nuclei at gamma-ray energies
• The Gamma-Ray Window to Intergalactic Magnetism
• Synchrotron self-Compton as a likely mechanism of photons beyond the synchrotron limit in GRB 190114C
• On the origin of the multi-GeV photons from the closest burst with intermediate luminosity: GRB 190829A
• The future of gamma-ray astronomy
• Modeling the observations of GRB 180720B: From radio to sub-TeV gamma-rays
• GRB Fermi-LAT afterglows: explaining flares, breaks, and energetic photons
• Gamma-rays as probes of the Universe
• Time-Reversed Gamma-Ray Burst Light Curve Characteristics as Transitions between Subluminal and Superluminal Motion
• Rainbow Black Hole From Quantum Gravitational Collapse
• Neutrino pair annihilation ($\nu \bar{\nu }\to e^{-}{e}^{+}$) in the presence of quintessence surrounding a black hole
• Description of atypical bursts seen slightly off-axis
• Radiation by the superluminally moving current sheet in the magnetosphere of a neutron star
• The electromagnetic radiation whose decay violates the inverse-square law: detailed mathematical treatment of an experimentally realized example
• AGILE Observations of GRB 220101A: A "New Year's Burst" with an Exceptionally Huge Energy Release
• On the energy flow of $\lambda$ in Hořava-Lifshitz cosmology