Testing high energy neutrino emission from the Fermi Gamma-ray Space Telescope Large Area Telescope (4LAC) sources

TL;DR

This paper investigates whether certain Fermi-LAT detected active galactic nuclei, spatially correlated with IceCube neutrinos, could be sources of high-energy neutrinos under a lepto-hadronic model, by analyzing their spectral energy distributions and estimating neutrino fluxes.

Contribution

It provides the first detailed spectral energy distribution analysis of 4LAC sources correlated with IceCube neutrinos under a lepto-hadronic scenario, estimating their neutrino flux counterparts.

Findings

Some AGN sources show potential neutrino fluxes consistent with IceCube detections.

No definitive neutrino source was confirmed among the analyzed Fermi-LAT sources.

The spectral analysis supports the possibility of AGNs as neutrino emitters.

Abstract

The detection of the high-energy neutrino IC-170922A in spatial (within the error region) and temporal flare activity correlation with the blazar TXS 0506+056 allowed these objects to be considered as progenitor sources of neutrinos. Besides this, no more detection of this kind was reported. Some other neutrinos detected by IceCube show a spatial correlation (within the error region) from other Fermi-LAT detected sources. However, these objects did not show a flare activity like TXS 0506+056. Assuming a lepto-hadronic scenario through p$\gamma$ interactions, this work describes the SED in some objects from the fourth catalog of active galactic nuclei (AGNs) detected by the Fermi Gamma-ray Space Telescope Large Area Telescope (4LAC) sources, which are in spatial correlation with neutrinos detected by IceCube. Additionally, we estimate the corresponding neutrino flux counterpart from these sources.