Gas vs Collision Formation Distinction

Background: The existence of extremely massive black holes at high redshift might be explained by channels involving gas accretion dominating over star formation, especially in gas-dominated systems.

Question / Future Work: Determining the decisive factors that distinguish between a purely gas-dominated formation channel (which favors direct black hole formation via gravitational torques and runaway accretion) and a massive, compact cluster channel (which favors collision-based seed formation followed by gas accretion) based on the gas inflow rate versus star formation rate needs systematic exploration.