Quasars play a significant role in galaxy evolution by providing insights into the early universe and the formation of galaxies. Their brightness allows astronomers to observe distant quasars and learn about the conditions of the universe when these galaxies were first forming. Quasars were more abundant when the universe was about 20% of its current age, indicating that both quasar activity and star formation peaked together during this period [1].

Additionally, the connection between supermassive black holes at the centers of galaxies and their host galaxies suggests that the evolution of quasars is closely linked to the growth of galaxies. Notably, the mass of a black hole correlates with the mass of the surrounding galaxy, indicating a mutual influence between galactic and quasar evolution [4][5].

What role do quasars play in galaxy evolution?

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