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

A new study suggests that next-generation gravitational wave detectors could detect the first black holes formed in the early universe. The research, led by N.V. Krishnendu of the University of Birmingham, models how these detectors might capture signals from black holes that formed 13.54 billion years ago. The study uses Bayesian simulations and a realistic set of Pop III stars to test the capabilities of the Einstein Telescope and Cosmic Explorer. These detectors, planned to be operational in the near future, are designed to measure gravitational waves at lower frequencies, which could allow them to detect the early merging of black holes. The detectors are expected to provide more accurate measurements of the mass and location of these ancient black holes.

• The Einstein Telescope and Cosmic Explorer are planned underground and L-shaped facilities, respectively.
• The detectors are expected to measure gravitational waves at frequencies as low as 5 Hz, which is crucial for detecting the early mergers of black holes.
• The simulations show that these detectors could determine the properties of black holes formed 13.54 billion years ago with high accuracy, up to 12% of their actual mass.
• The detectors could pinpoint the location of these mergers to within 60 square degrees, which is significant for linking them with other cosmological features.

The study highlights the potential of next-generation detectors to provide insights into the formation and evolution of the first black holes, which played a key role in the early universe. The research also emphasizes the importance of accurate mass measurements and precise localization for understanding the growth of supermassive black holes. While the detectors are still in the planning phase, their successful operation would offer a unique opportunity to study the earliest cosmic events.

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