Why do some galaxies host rapidly accreting supermassive black holes (SMBHs), and others do not?
Is SMBH accretion driven by large-scale galaxy properties, like star formation rate, stellar mass, or morphology?
Does the active phase of rapid SMBH accretion cause galaxy-wide feedback, quenching star formation in its host?
What are the typical masses of black hole seeds, as observed in high-redshift dwarf galaxies?
What is the probable assembly history of our Milky Way's black hole and galaxy bulge, as observed through the analogs of Milky Way progenitors in the teenage universe?