Fig. 3
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Final BH spin dimensionless parameter after a single accretion episode as a function of Mratio as defined in Eq. (10). The solid, dotted, dashed and dot-dashed lines represent af for the initial spin values −1, −0.5, 0, and 0.5 respectively. The solid and dotted lines represent the event of an accretion episode in which the accretion disc is counter-rotating with respect to the BH.
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