Grand unification of AGN activity in the ΛCDM cosmology

摘要: We track the coevolution of supermassive black holes (SMBHs) and their host galaxies through cosmic time. The calculation is embedded in GALFORM semi-analytic model which simulates formation evolution a cold dark matter (CDM) universe. hole (BH) galaxy models are coupled: during galaxy, hot gas added to SMBH by flows triggered halo cooling, disc instabilities mergers. This builds up mass spin BH, resulting accretion power regulates cooling subsequent star formation. flow assumed form geometrically thin cool when rate exceeds Graphic, thick, radiatively inefficient falls below this value. quasar optical luminosity function matches observations well, correlates with bulge as observed Mbh–Mbulge relation. BH distribution depends strongly on whether we assume that any given episode remains same plane or it fragments into multiple, randomly aligned episodes due its self-gravity. refer these cases ‘prolonged’ ‘chaotic’ modes, respectively. In chaotic there clear correlation (and hence mass). Massive BHs (M > 5 × 108 M⊙) hosted giant elliptical rapidly spinning, while lower spiral have much spin. Using Blandford–Znajek mechanism for jet production calculate power, our reproduces radio loudness galaxies, low ionization emission regions (LINERS) Seyferts, suggesting properties active nuclei (AGN) natural consequence both central SMBH. first confirmation CDM can reproduce phenomenology AGN.