A numerous amount of quasars at high-redshift have been discovered throughout the past decade (Wu et al. 2015, Bañados et al. 2017). A common characteristic between these discoveries is that each quasar contains a black hole of approximately 10^9Msun. Such massive black holes at the early stages of the Universe (≤1 billion years) challenges the theories to black hole formation, growth and their co-evolution with their host galaxies. Accretion above the Eddington limit would allow for this very fast growth, but how does a black hole undergoing super-Eddington accretion affect the gas on kpc-scales?
Using Ramses, we study the super-Eddington accretion and feedback phases in an idealized setup of a collapsing DM halo. We want to understand if super-Eddington accretion can proceed long enough to impact black hole growth.
I will present simulations showing that super-Eddington generally affects negatively black hole growth. Due to very strong super-Eddington feedback events that impact up to kpc-scales, black holes aren't able to grow efficiently, despite many super-Eddington accretion episodes.
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