Study of PeV neutrinos around dwarf galaxies near giant lobes of Centaurus A

Abstract

The origin of recently discovered PeV neutrinos is an unsolved problem. In this work we consider a hadronic scenario to produce PeV neutrinos from a region around giant lobes of Centaurus A. Although ultrahigh-energy cosmic rays (UHECRs) are accelerated and confined by giant lobes, they can escape to be later injected in the inter-group medium where galaxies near the giant lobes provides the condition to confine them. UHECRs interact with low-energy photons and protons producing high-energy photons and neutrinos. We found that although the IC35 event cannot be generated inside the giant lobes, this PeV neutrino might be created in galaxies close to the Lobes of Cen A.