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The effect of photon-axion-like particle conversions in galaxy clusters on very high energy γ-ray spectra
Manuel Meyer, Dieter Horns, Luca Maccione +3
Very high energy (VHE, energy >~ 100 GeV) γ-rays originating from extragalactic sources interact with low energy photons of background radiation fields and produce electron-positro…
Revisiting the Indication for a low opacity Universe for very high energy gamma-rays
Manuel Meyer, Dieter Horns, Martin Raue
Very high energy (VHE, energy >~ 100 GeV) γ-rays undergo pair production with photons of the extragalactic background light (EBL). Thus, the intrinsic γ-ray flux of cosmological so…
Hardening of TeV gamma spectrum of AGNs in galaxy clusters by conversions of photons into axion-like particles
Dieter Horns, Luca Maccione, Manuel Meyer +3
A fraction of AGN producing VHE gamma-rays are located in galaxy clusters. The magnetic field present in the intra-cluster medium would lead to conversions of VHE photons into axio…