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

Multiwavelength observations suggest that clusters are reservoirs of vastamounts relativistic electrons and positrons that are either injected into andaccelerated directly in the intra-cluster medium, or produced as secondarypairs by cosmic ray ions scattering on ambient protons. In these possiblescenarios gamma rays are produced either through electrons upscatteringlow-energy photons or by decay of neutral pions produced by hadronicinteractions. In addition, the high mass-to-light ratios in clusters incombination with considerable Dark Matter (DM) overdensities makes theminteresting targets for indirect DM searches with gamma rays. The resultingsignals are different from known point sources or from diffuse emission andcould possibly be detected with the Fermi-LAT. Both WIMP annihilation/decayspectra and cosmic ray induced emission are determined by universal parameters,which make a combined statistical likelihood analysis feasible. We presentinitial results of this analysis leading to limits on the DM annihilation crosssection or decay time and on the hadron injection efficiency.

A Combined Analysis of Clusters of Galaxies - Gamma Ray Emission from Cosmic Rays and Dark Matter