Using VLBI observations for modeling emission properties of neutrino candidate blazars

There have been recent population studies supporting the idea that radio-loud blazars can be the potential source of high-energy astrophysical neutrinos being observed by IceCube. The understanding of neutrino production from these sources is intimately connected to explaining their multi-wavelength spectra as well. In this talk, ongoing work will be presented in modelling the lepto-hadronic spectral energy distribution (SED) for the neutrino-candidate blazar PKS 1749+096 in which both, the bulk properties and the particle distribution in the emission region, are anchored directly using parsec-scale VLBI observations of the jet . When combined with physically motivated assumptions about velocity stratification in astrophysical jets, this approach allows modeling the SED from radio to gamma-rays, including high-energy flaring, without using numerical fitting to archival data whilst giving consistency with IceCube observations and staying in the sub-Eddington regime. Thus, the talk attempts to motivate using radio observations as an anchor for improving our understanding of multi-messenger emission from neutrino-candiate blazars.