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Can a passing black hole disturbance leave a trace in Hawking radiation?

Summary by Phys.org
Black holes, despite their extreme nature, are described by surprisingly few basic parameters: their mass, charge and spin. Two black holes may have formed for completely different reasons and passed through very different histories, yet still end up in the same final state. John Wheeler summarized this idea with the famous phrase "black holes have no hair."

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A black hole can return to a quiet state after a temporary disturbance. Nevertheless, a mathematically isolated portion of its Hawking radiation during an asymmetrical disturbance must show a finite deviation from the reference behavior, as a mathematical analysis shows. The decisive factor here is the greatest intermittent inequality between opposite directions. Istanbul (Turkey). Black holes become in stationary state [...] The post Can a blac…

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Phys.org broke the news in Douglas, United Kingdom on Tuesday, October 6, 2026.
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