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

## TL;DR

This paper investigates the potential origin of PeV neutrinos near Centaurus A's giant lobes, proposing a hadronic model involving cosmic ray interactions, but finds certain neutrino events cannot be explained by this scenario.

## Contribution

It introduces a hadronic scenario for PeV neutrino production around Centaurus A's giant lobes and assesses its viability against observed neutrino events.

## Key findings

- UHECRs can escape giant lobes and interact with surrounding medium.
- The IC35 neutrino event cannot be explained by the proposed model.
- The model constrains the possible sources of PeV neutrinos near 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 the IC35 event cannot be generated neither inside the giant lobes nor galaxies close to the lobes of Centaurus A.