Blazars are highly energetic objects with a broad band emission covering the whole electromagnetic
spectrum. Their spectral energy distribution can be described in terms of both hadronic and
leptonic processes. In leptonic models the emission is produced by electrons and positrons in
the relativistic jet, while in hadronic ones the contribution from accelerated protons becomes
relevant. Importantly, only hadronic processes allow the production of high energy neutrinos,
the detection of which is an important step towards finding the long-sought sources of ultra-high
energy cosmic rays. Among the potential neutrino-emitter candidates, the interest in blazars has
grown after the evidence for a joint photon-neutrino emission from the gamma-ray flaring source
TXS 0506+056 in 2017. Since the possible emission of neutrinos from TXS 0506+056 is not fully
understood, it is important to investigate the emission properties of sources with similar features.
In this work, we scan the most recent 4LAC-DR2 Fermi catalog, based on 10 years of Fermi-LAT
data, searching for other sources sharing similar properties as TXS 0506+056. The selection of
candidates is made by focusing on a number of key parameters, which were constrained in a range
close to the TXS 0506+056 value. The efficiency of the accretion mechanism and the nature of the
candidates as Flat Spectrum Radio Quasars or BL Lac objects is analyzed. Furthermore, potential
information on the neutrino flux from these sources and the detectability prospects at TeV energies
are investigated via a lepto-hadronic modeling of their spectral energy distribution.