Next-gen gravitational wave detectors could spot the first black holes

A groundbreaking study, led by astrophysicist N.V. Krishnendu from the University of Birmingham, reveals the potential for next-generation gravitational wave detectors to uncover evidence of the universe's earliest black holes. These black holes, known as Population III or Pop III stars, emerged a mere few hundred million years after the Big Bang, marking the "let there be light" moment in cosmic history.

Pop III stars were unlike any stars we observe today; they were born from pristine hydrogen and helium, lacking any "metal" or other elements. These massive stars grew up to hundreds of times larger than our Sun before meeting a swift end, often collapsing into the universe's first black holes. In some cases, these black holes formed pairs and eventually collided, generating gravitational waves.

While our current detection capabilities may not be sensitive enough to capture these primordial events, the upcoming suite of advanced gravitational wave detectors could provide us with the tools needed to witness and study these cosmic phenomena.