AGN: Accretion onto SMBH

$AGN: Accretion onto SMBH Accretion Disk “Torus” Obscurer Galactic Center gas Star forming regions e.g. in spiral arms First observational constraint: - Column density - Covering fraction Total growth over cosmic time? (z=0.5-3) Self-regulation? AGN-galaxy connection? … How is it stable and extended? Density? Substructure? Feeding of SMBH? First observational constraint: - Intrinsic accretion history - Luminosity function$