Nature Astronomy, Published online: 25 August 2022; doi:10.1038/s41550-022-01761-5

A new selection method is used to obtain a sample of dual/lensed active galactic nuclei (AGN) candidates with sub-arcsec separations from Gaia data. This substantially increases the known number of dual AGNs, with implications for studies of in-spiralling supermassive black holes.

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