Séminaires
Probing cosmic-ray accelerators with gamma-ray astronomy
par
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Europe/Paris
Amphithéâtre (CPPM)
Amphithéâtre
CPPM
Description
Cosmic-rays are particles (mostly protons and hadrons) accelerated up to relativistic speed. The origin of these particles remains unknown despite the recent detection of the characteristic pion-decay signature in the gamma-ray spectra of two supernova remnants. These objects are considered as prime candidates for particle acceleration in our Galaxy. Gamma-ray detectors such as the Fermi satellite or Cherenkov telescopes arrays like H.E.S.S. are therefore powerful instruments to probe cosmic-ray accelerators.
First I will introduce the cosmic-rays properties and their associated radiative processes, then I will present the detection techniques and the galactic objects that are potential particle accelerators. Finally I will describe examples of recently detected sources and I will conclude by the prospects brought by the future telescope array CTA.