Speaker
Description
JWST observations have opened a new window on the early Universe, revealing black holes with masses of several million solar masses already at z>8, which challenge our understanding of their accretion mechanisms. In recent years, super-Eddington accretion has emerged as a promising solution and has been adopted in both simulations and semi-analytical models.
In this talk, I will present the results of my recent work investigating the role of super-Eddington accretion in cosmological hydrodynamical zoom-in simulations during a major merger between two haloes at z=11. We performed a suite of runs exploring different seeding prescriptions and feedback configurations. I will show that in the majority of the runs performed, the merger has a negligible impact on black hole accretion, while accretion is primarily regulated by black hole kinetic feedback and the gas density around it.