TL;DR
This paper reviews recent advances in gamma-ray astronomy, highlighting new instruments and missions that aim to address key scientific challenges like dark matter, cosmic rays, and particle acceleration.
Contribution
It discusses upcoming instruments and mission concepts designed to tackle major scientific questions in gamma-ray astronomy.
Findings
Several thousand gamma-ray sources identified
New instruments will improve understanding of particle acceleration
Future missions aim to solve dark matter and cosmic ray origins
Abstract
The field of gamma-ray astronomy has experienced impressive progress over the last decade. Thanks to the advent of a new generation of imaging air Cherenkov telescopes (H.E.S.S., MAGIC, VERITAS) and thanks to the launch of the Fermi-LAT satellite, several thousand gamma-ray sources are known today, revealing an unexpected ubiquity of particle acceleration processes in the Universe. Major scientific challenges are still ahead, such as the identification of the nature of Dark Matter, the discovery and understanding of the sources of cosmic rays, or the comprehension of the particle acceleration processes that are at work in the various objects. This paper presents some of the instruments and mission concepts that will address these challenges over the next decades.
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