Neutrino emission from NGC1068: looking at the contribution of the kiloparsec jet

Abstract

The IceCube telescope recently found an excess of 79 track-like neutrino events at TeV energies correlated with NCG1068 position (equivalent to a significance of 4.2 sigmas). Considering that NGC1068 presents a core with a high star-formation rate and hosts an active galactic nucleus, these observations can be the result of different emitting regions. A recent work based on Atacama Large Millimeter Array (ALMA) data describes the characteristics of the kiloparsec jet associated to this AGN identifying 4 major blobs on its head. In this proceeding we describe the possible non-thermal emission associated with this jet and the bright blobs obtaining their physical parameters from the ALMA observations as well as from the electromagnetic spectral energy distribution (SED). Moreover a lepto-hadronic and a hadronic scenarios have been explored: for the former we associate the electromagnetic SED with the leptonic emission from the blobs, using the synchrotron radiation as the target for the cosmic rays accelerated in the jet or in the observed blobs; for the latter we consider the gas environment around the head of the jet as the molecular target for the accelerated cosmic rays (CRs). We compute neutrino emission implied by these two scenarios and compared it with the IceCube observations for this Seyfert galaxy. We show that a multi-component description of non-thermal emission can’t exclude the observed kiloparsec jet from the main emitting regions.