Oral Presentation

Super-Eddington mass growth of intermediate-mass seed black holes embedded in dusty circumnuclear disks

Author(s): Daisuke Toyouchi (Kavli IPMU)

Presenter: Daisuke Toyouchi (Kavli IPMU)

Super-Eddington gas accretions onto seed black holes are a possible mechanism for forming supermassive black holes (SMBHs) with about one billion solar mass discovered at z ~ 7. We perform the first three-dimensional radiation hydrodynamical simulations investigating the growth of intermediate-mass BHs embedded in massive self-gravitating, dusty nuclear accretion disks. We find that the central BH can be fed at rates exceeding the Eddington rate only when the dusty disk becomes sufficiently optically thick to ionizing radiation. In this case, mass outflows from the disk owing to photoevaporation are suppressed, and thus a large fraction (~ 40%) of the mass injection rate can feed the central BH. In this talk, based on these results, we will discuss the possible formation site of SMBHs in the early universe.