Scientists say the first black holes formed when the universe’s earliest stars—Population III stars—collapse. These first stars appear hundreds of millions of years after the Big Bang and form from pristine hydrogen and helium, with almost no heavier elements (“metals”) to slow their growth. They are thought to be very massive, reaching tens to hundreds of times the Sun’s mass, and they end their lives relatively quickly, often producing early black holes.
A study led by N.V. Krishnendu of the University of Birmingham and colleagues discusses how upcoming, more sensitive gravitational-wave instruments could probe those ancient objects. The work focuses on the idea that some early black holes form binary pairs and later merge, producing gravitational waves. If future detectors reach the required sensitivity, those merger signals could be detectable, allowing researchers to learn about the properties and history of the first black holes.
Across the outlets, the shared emphasis is on the same chain of events—Pop III stars to early black holes to potential black-hole mergers—and on the prospective role of next-gen gravitational-wave detectors in observing those earliest systems.
