Jet formation studies in AGN: A search for new targets

Context. In recent years, the jet formation region in active galaxies has been imaged through millimeter very long baseline interferometry (mm-VLBI) for a few ideal targets, in particular, M 87. An important leap forward for understanding jet launching could be taken by identifying a larger number of suitable objects, characterized by different accretion modes and jet powers. Aims. In this article, we present 1 cm and 7 mm VLBI data of a sample of 16 poorly explored radio galaxies, comprising both high-excitation (HEGs) and low-excitation galaxies (LEGs), spanning a broad range in terms of radio power. There are several γ-ray emitters among this sample. The sources proximity (z 50 mJy) with a superb spatial resolution (< 500 RS) at 7 mm. The powerful HEG 3C 452 is interesting as well, due to its highly symmetric, two-sided jet base. Most sources are expected to become prime targets for future experiments with the next generation Event Horizon Telescope (ngEHT) and next generation Very Large Array (ngVLA).