Growth and Feedback from the First Black Holes

TL;DR

This paper reviews the physical processes and recent research on how early black holes grow and influence their environment, emphasizing the role of feedback mechanisms and galaxy evolution.

Contribution

It provides a comprehensive overview of black hole growth and feedback processes at high redshift, highlighting recent research developments.

Findings

Black holes must grow significantly from their seeds to be observed at z > 6.

Feedback from radiation and supernovae initially slows black hole growth.

Growth accelerates after the host galaxy reaches a critical mass.

Abstract

Regardless of their initial seed mass, any active galactic nuclei observed at redshifts z > 6 must have grown by several orders of magnitude from their seeds. In this chapter, we will discuss the physical processes and latest research on black hole growth and associated feedback after seed formation. Fueling is initially slowed down by radiative feedback from the black hole itself and supernova explosions from nearby stars. Its growth however accelerates once the host galaxy grows past a critical mass.