English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

Galactic cosmic rays are commonly believed to be accelerated at supernovaremnants via diffusive shock acceleration. Despite the popularity of this idea,a conclusive proof for its validity is still missing. Gamma-ray astronomyprovides us with a powerful tool to tackle this problem, because gamma rays areproduced during cosmic ray interactions with the ambient gas. The detection ofgamma rays from several supernova remnants is encouraging, but still does notconstitute a proof of the scenario, the main problem being the difficulty indisentangling the hadronic and leptonic contributions to the emission. Oncereleased by their sources, cosmic rays diffuse in the interstellar medium, andfinally escape from the Galaxy. The diffuse gamma-ray emission from theGalactic disk, as well as the gamma-ray emission detected from a few galaxiesis largely due to the interactions of cosmic rays in the interstellar medium.On much larger scales, cosmic rays are also expected to permeate theintracluster medium, since they can be confined and accumulated within clustersof galaxies for cosmological times. Thus, the detection of gamma rays fromclusters of galaxies, or even upper limits on their emission, will allow us toconstrain the cosmic ray output of the sources they contain, such as normalgalaxies, AGNs, and cosmological shocks. In this paper, we describe the impactthat the Cherenkov Telescope Array, a future ground-based facility forvery-high energy gamma-ray astronomy, is expected to have in this field ofresearch.

Gamma-ray signatures of cosmic ray acceleration, propagation, and confinement in the era of CTA