A New Sample of Closely Separated Dual and Binary AGN Candidates Revealed with the Radio Fundamental Catalog
Researchers used archival radio data to find 241 dual and binary Active Galactic Nuclei candidates from a literature catalog. They analyzed ten systems to distinguish between true dual AGN and jet activity based on radio parameters like compactness. The study found that some candidates are very close, highlighting challenges for the International Celestial Reference Frame (ICRF) precision.