Author

L. Mohrmann

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Open access Sep 2026

Evidence of a spectral steepening of the gamma-ray emission from the Galactic center ridge

Very high-energy (VHE) γ-ray emission detected from the central molecular zone (CMZ) hints at diffusive propagation of cosmic rays (CRs) injected continuously near the Galactic center (GC). Using H.E.S.S. VHE γ-ray observations, we aim to construct a multicomponent description of the region in order to derive the spati...

A. Acharyya, F. Aharonian, H. Ashkar et al. · Astronomy & Astrophysics · 0 citations

#diffusion models Open access Sep 2026

Extended gamma-ray emission in the vicinity of the Westerlund 1 massive star cluster and Kes 41 supernova remnant seen by the Fermi Large Area Telescope

There is growing evidence of cosmic-ray acceleration in massive stellar clusters. Furthermore, extended gamma-ray emission suggests that particle transport in the vicinity of their sources is influenced by physical processes markedly different from large-scale diffusion in the Milky Way. We characterize extended gamma-...

L. Tibaldo, R. Bernet, L. Härer et al. · Astronomy & Astrophysics · 0 citations