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Astronomers find evidence for three subpopulations of merging black holes - Phys.org
Overview
Researchers report evidence that merging black holes group into three distinct subpopulations based on observed properties like masses and spins, implying multiple formation channels. A recent potential detection of an event-horizon signature in a single merger adds an event-level probe of black-hole physics; combining population statistics with detailed waveform features may help distinguish formation scenarios and rule out exotic alternatives. Together, these approaches improve our ability to connect gravitational-wave observations with how extreme objects form and evolve.
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