Supermassive black hole seed formation at high redshifts: long-term evolution of the direct collapse

摘要: We use cosmological adaptive mesh refinement (AMR) code Enzo zoom-in simulations to study the long term evolution of collapsing gas within dark matter (DM) halos at high redshifts. This direct collapse process is a leading candidate for rapid formation supermassive black hole (SMBH) seeds z. To circumvent Courant condition small radii, we have used sink particle method, and focus on scales ~0.01-10 pc. The proceeds in two stages, with secondary runaway happening central 10 pc, no detected fragmentation. particles form when requires additional grid size highest level. Their mass never exceeds ~10^3 Mo, sole exception seed which grows dramatically ~ 2 x 10^6 Mo ~2 Myr, confirming feasibility this path SMBH. time variability angular momentum axis accreted results misaligned disks --- inner disk, more massive, outer disk inclined by ~45^o disk. self-gravity these heavily diluted both lie Roche limit seed. While geometrically thin weakly asymmetric, flares due turbulent motions as result massive inflow along pair penetrating filaments. geometry via filaments determines dominant Fourier modes non-self-gravitational origin. do not confirm that m=1 principal mode drives presence object. positions depend scale chosen break self-similar collapse, overall configuration appears be generic, expected becomes sufficiently massive.