  Recent observations are shedding light on the important role that active
galactic nuclei (AGN) play in the production of high-energy neutrinos. In this
study, we focus on one object, 5BZB J0630-2406, which is among the blazars
recently proposed as associated with neutrino emission during the first 7-yr
IceCube observations. Modelling the quasi-simultaneous, broad-band spectral
energy distribution, we explore various scenarios from purely leptonic to
lepto-hadronic models, testing the inclusion of external photon fields. This
theoretical study provides a complementary testing ground for the proposed
neutrino-blazar association. Despite being historically classified as a BL Lac,
our study shows that 5BZB J0630-2406 belongs to the relatively rare sub-class
of high-power flat-spectrum radio quasars (FSRQs). Our results indicate that
interactions between protons and external radiation fields can produce a
neutrino flux that is within the reach of the IceCube detector. Furthermore,
the spectral shape of the X-ray emission suggests the imprint of hadronic
processes related to very energetic protons.
