  Close binary interactions perform a key role in the formation and shaping of
planetary nebulae. However only a small fraction of Galactic planetary nebulae
are known to host close binary systems. Many such systems are detectable
through photometric variability. We searched recently published epoch
photometry data from Gaia DR3 for planetary nebula central stars with periodic
photometric variability indicative of binarity, uncovering four previously
unknown close binaries.
