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Physicists Suggest GW190728 Originated Within Dense Dark-Matter Cloud

5/17/2026

Summary

Story summary

Physicists propose that the July 2019 gravitational-wave event GW190728 originated from a black-hole merger inside a dense dark-matter cloud.
They modeled dark-matter clouds around spinning black holes, predicted distinctive waveforms, and found only GW190728 matching a dense environment among 28 LVK detections.
Josu Aurrekoetxea warned the statistical significance is low, while Rodrigo Vicente said mergers could probe dark matter at smaller scales.

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Story summary

Physicists propose that the July 2019 gravitational-wave event GW190728 originated from a black-hole merger inside a dense dark-matter cloud.
They modeled dark-matter clouds around spinning black holes, predicted distinctive waveforms, and found only GW190728 matching a dense environment among 28 LVK detections.
Josu Aurrekoetxea warned the statistical significance is low, while Rodrigo Vicente said mergers could probe dark matter at smaller scales.