In what galaxies do black holes live in the early universe?

Using state-of-the-art technology and sophisticated data analysis tools, a team from MPIA has developed a new and powerful technique to directly determine the mass of a galaxy hosting an active supermassive central black hole at a distance of nearly 9 billion light-years from Earth. This pioneering method promises a new approach for studying the co-evolution of galaxies and their central black holes, which typically relies on mass determinations.