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/

Global: Zendy Plus annual

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

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Very high energy (VHE, energy >~ 100 GeV) {\gamma}-rays originating fromextragalactic sources interact with low energy photons of background radiationfields and produce electron-positron pairs. Alternatively, in the presence ofambient magnetic fields, they can convert into hypothetical axion-likeparticles (ALPs), pseudo-scalar spin-0 bosons, predicted by extensions of thestandard model. These particles propagate unimpeded over cosmologicaldistances. Here, the effect of photon-ALP oscillations in magnetic fields ofgalaxy clusters and the Milky Way on VHE {\gamma}-ray spectra is studied. It isshown that this mechanism can lead to a substantial enhancement of the VHE fluxand a spectral hardening, thus effectively reducing the opacity of the Universeto VHE {\gamma}-rays.

The effect of photon-axion-like particle conversions in galaxy clusters on very high energy {\gamma}-ray spectra