Fig. 4.
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BH spin parameter for the V404 Cyg compact object for each of the best models, according to Eq. (7). As the BH accretes matter it spins up, provoking the increase of 
. Thus, the lower the β, the lower the BH spin. The vertical dashed lines are the predicted ages for V404 Cyg. The values of the BH spin for these times are given in Table 3.
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