Tommaso Zana

The role of major mergers in triggering super-Eddington accretion

James Webb Space Telescope observations have opened a new era in the exploration of the high-redshift Universe, revealing black holes (BHs) with masses of several million solar masses already at z>8, challenging our understanding of their growth mechanisms. In this context, super...

Episodic super-Eddington accretion as a clue to Overmassive Black Holes in the early Universe

Abstract Early JWST observations are providing growing evidence for a ubiquitous population of accreting supermassive black holes (BHs) at high redshift, many of which appear overmassive compared to the empirically-derived local scaling relation between black hole mass and host g...