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New Candidate Star Challenges Black Hole Formation Theories

11/19/2025

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Summary

Story summary

Gravitational waves arise from collisions of dense objects like black holes and neutron stars, formed when massive stars go supernova.
A new candidate, S251112cm, has a mass below the Sun, suggesting it could be a neutron star with unusual formation or a primordial black hole.
Dr. Christopher Berry of the University of Glasgow speculates that fragmentation during supernovae could yield sub-solar-mass neutron stars.

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Story summary

Gravitational waves arise from collisions of dense objects like black holes and neutron stars, formed when massive stars go supernova.
A new candidate, S251112cm, has a mass below the Sun, suggesting it could be a neutron star with unusual formation or a primordial black hole.
Dr. Christopher Berry of the University of Glasgow speculates that fragmentation during supernovae could yield sub-solar-mass neutron stars.