Speaker
Description
Blazar jets are among the most powerful particle accelerators in the Universe and provide a unique window into the growth of supermassive black holes across cosmic time. By tracing the evolution of blazar populations, we can investigate the connection between jet production and the rapid assembly of the earliest supermassive black holes, test whether the properties and power of relativistic jets evolve with redshift, and constrain the origin of the cosmic high-energy backgrounds. In this talk, I will review recent advances in our understanding of blazar evolution from X-ray and γ-ray surveys, highlighting implications for jet power, black hole–jet co-evolution, and the composition of the cosmic X-ray and γ-ray backgrounds. I will also discuss future prospects for blazar evolution studies with upcoming high-energy observatories, including COSI and CTAO.