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Fig. 10.

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Variations of the BH mass vs the galaxy mass with color coding according to the value of cos(Ψstar, BH). We show three typical evolutions of intermediate mass BHs to illustrate the three different regimes followed by the variations of Ψstar, BH: (1) a tendency to BH-galaxy spin alignment right after their birth and for relatively short periods (MBH < 3 × 104M and Mstar ≲ 2 × 107M), (2) erratic variations (MBH ≲ 105M), (3) new tendency to alignment at late time (5 × 109M ≲ Mstar). Note that in the case of BH-1049, the blue region at late time corresponds to the BH spin anti-alignment situation.

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