Gravitational Waves
A recent study from the University of Miami suggests that an unusual gravitational wave detected by LIGO could represent the first evidence of a primordial black hole. Researchers say such an object would support the idea that these ancient black holes make up dark matter.
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Physicists have found a potential signature of dark matter in data from a black hole merger observed in 2019. The signal known as GW190728 showed patterns consistent with the invisible substance interacting with the colliding objects. A new model developed by researchers at MIT and partner institutions made the analysis possible.
Researchers at Hirosaki University have suggested a method to identify the source of ultra-low-frequency gravitational waves by looking for 'beat' patterns in pulsar signals. This approach could distinguish between waves from cosmic inflation and those from supermassive black hole binaries. The proposal builds on 2023 evidence from pulsar timing arrays that falls short of full confirmation.
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Astronomers announced on September 17, 2025, the detection of a black hole merger that provides strong evidence for Stephen Hawking's area theorem. Observed via gravitational waves, the event aligns with predictions that black hole surface areas cannot decrease. This bolsters fundamental physics theories amid ongoing cosmic explorations.