Diffuse CR, neutrino and gamma-ray fluxes from AGNs

International audienceWe investigate how the extragalactic proton component derived within the ’escape model’ can be explained by astrophysical sources. We find that the complete extragalactic proton spectrum can be explained by a single source population with late time evolution, such as BL Lacs or FR I galaxies. We then calculate the diffuse neutrino and $\gamma$-ray fluxes produced by these CR protons interacting with gas inside their sources, their host galaxies and galaxy clusters. For a spectral slope of CRs close to $\alpha =$ 2.1 - 2.2 as suggested by shock acceleration, we find that these UHECR sources contribute to a dominant fraction of both the isotropic $\gamma$-ray background and to the extragalactic part of the astrophysical neutrino signal observed by IceCub