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Black hole spin and radio loudness in a Lambda cold dark matter universe

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Academic year: 2020

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Fig. 1 shows the distributions of bulge masses for galaxies host- host-ing central BHs with low and high spin values at z = 0 (dashed and solid lines, respectively), for a model where the angular  mo-mentum of the accretion disc depends on the process resp
Figure 3. Distributions of BH spins at z = 0 hosted by elliptical (left-hand panels) and spiral galaxies (right-hand panels) from Model A, in which the direction of the accretion disc angular momentum is inferred from the  pro-cess responsible for the gas
Fig. 5 shows the contribution of each BH growth mechanism to the BH spin value at z = 0 including mergers between BHs, and gas accretion driven by gas cooling processes, galaxy minor/major mergers and disc instabilities in the host galaxy
Figure 6. Redshift evolution of properties of the BH–disc system for an example galaxy extracted from SAG (spiral galaxy with z = 0 stellar mass M Stellar = 8 × 10 9 M  and a BH mass of M BH = 2 × 10 7 M )
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