Story perspectives

Forbidden Black Hole Merger Challenges Cosmic Formation Theories

11/20/2025

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Summary

Story summary

The black hole merger GW231123 involved two 'forbidden' black holes of 100 and 130 solar masses.
These objects sit in the mass gap of 70–140 solar masses, once thought impossible after supernovae.
Simulations indicate rapidly spinning, magnetized stars can collapse differently, producing such black holes.
The result challenges existing formation models and suggests massive black holes may form more efficiently, reshaping views of cosmic history and galaxy evolution.

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Story summary

The black hole merger GW231123 involved two 'forbidden' black holes of 100 and 130 solar masses.
These objects sit in the mass gap of 70–140 solar masses, once thought impossible after supernovae.
Simulations indicate rapidly spinning, magnetized stars can collapse differently, producing such black holes.
The result challenges existing formation models and suggests massive black holes may form more efficiently, reshaping views of cosmic history and galaxy evolution.