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A literature compilation of nuclear star cluster (NSC) masses is used tostudy the correlation between global and nuclear properties. A comparison ofobservational data to the predictions of semi-analytical galaxy formationmodels places constraints on the co-evolution of NSCs, massive black holes(MBHs) and host galaxies. Both data and theoretical predictions show anincreased scatter in the NSC scaling correlations at high galaxy masses, and weshow that this is due to the progressively more efficient ejection of starsfrom NSCs caused by MBH binaries in more massive stellar spheroids. Our resultsprovide a natural explanation of why in nucleated galaxies hosting a MBH, theratio (M_NSC+M_MBH)/M_bulge (with M_bulge the host spheroid's mass) showssignificantly less scatter than M_NSC/M_bulge, and suggest that the formationof MBHs and NSCs are not mutually exclusive, as also supported by observationsof co-existing systems. Both MBHs and NSCs represent generic products of galaxyformation, with NSCs being destroyed or modified by the merger evolution oftheir companion MBHs.

The imprint of massive black-hole mergers on the correlation between nuclear clusters and their host galaxies