Landing page for project EG100

Large-area multi-wavelength surveys show that the radio-loud AGN population in the local Universe is dominated by compact radio-sources. We defined them 'FR0' in contrast with classical FR classes of extended radio-galaxies. FR0s share the same properties of the edge-darkened FRI from the point of view of their hosts (red, massive, early type galaxies with massive black holes), radio and optical nuclear emission, but show a dramatic deficit of extended radio emission. The origin of this difference and the connection between FR0 and the FRI radio-galaxies is not yet understood. The aim of this proposal is to solve the puzzle of FR0 radio galaxies investigating what causes their deficit of extended radio emission. JVLA images for 25 FR0s in the A configuration still show mostly (21 objects) unresolved radio structures. We here propose to obtain pc scale radio images of a sample of 11 FR0s with the EVN array. This will enable us to test various scenarios for the paucity of extended radio emission. The solution of this puzzle will provide a breakthrough in our understanding the central engine of radio-loud AGN population, obtained by exploring its dominant component: the compact radio-galaxies.

This data is part of the archive of VLBI data maintained by JIVE on behalf of the EVN, a network of radio telescopes located primarily in Europe and Asia, with additional antennas in South Africa. The EVN archive itself has the DOI https://doi.org/10.17616/R3Z197