The eMERLIN and EVN View of FR 0 Radio Galaxies

We present the results from high-resolution observations carried out with eMERLIN UK-array and European VLBI network (EVN) for a sample of 15 FR 0s, i.e., compact core-dominated radio sources associated nearby early-type galaxies (ETGs), which represent bulk local galaxy population. The 5 GHz available five objects exhibit sub-mJy core components reveal pc-scale twin jets four 0s once JVLA archival visibilities data are combined. 1.66 EVN 10 display one- two-sided jetted morphologies cores. emission contributes, on average, to about one tenth total extended emission, although we noted an increasing contribution flat-/inverted-spectrum sources. found unprecedented linear correlation between luminosity (∼1021.3–1023.6 W Hz−1) [O III] line luminosity, generally considered as proxy accretion power, large LINER-type radio-loud low-luminosity active nuclei, all hosted in massive ETGs, include Is. This result represents further evidence common jet–disc coupling Is, despite then differing kpc-scale structure. For our other 0 samples reported literature, estimated jet brightness sidedness ratios, typically range three. parameter roughly gauges Lorentz factor Γ, turns 1 2.5 most sample. corroborates scenario that characterized by mildly relativistic jets, possibly lower-spinning black holes (BHs) than highly spinning BHs relativistic-jetted galaxies,