Neutrinos from photo-hadronic interactions in Pks2155-304

TL;DR

This paper explores the potential for neutrino production in the blazar Pks2155-304 through photo-hadronic interactions, linking optical and TeV emissions during high-energy flares.

Contribution

It introduces a model predicting neutrino production from photo-hadronic interactions in Pks2155-304, highlighting the correlation between optical and TeV emissions.

Findings

Optical emission in low states can trigger photo-hadronic interactions.

Neutrino production correlates with high optical radiation fields.

High-energy photon emission is linked to hadronic processes.

Abstract

The high-peaked BL Lac object Pks2155-304 shows high variability at multiwavelengths, i.e. from optical up to TeV energies. A giant flare of around 1 hour at X-ray and TeV energies was observed in 2006. In this context, it is essential to understand the physical processes in terms of the primary spectrum and the radiation emitted, since high-energy emission can arise in both leptonic and hadronic processes. In this contribution, we investigate the possibility of neutrino production in photo-hadronic interactions. In particular, we predict a direct correlation between optical and TeV energies at sufficiently high optical radiation fields. We show that in the blazar Pks2155-304, the optical emission in the low-state is sufficient to lead to photo-hadronic interactions and therefore to the production of high-energy photons.