Physicists Identified Hairy Black Hole Fission
Researchers discovered that unstable hairy black holes can decay into a separate black hole and a boson star.
Updated on Sept. 29, 2026 in Physics
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Physicists at the University of Aveiro have identified a decay mechanism for hairy black holes known as fission. This process separates a hairy black hole into a bald black hole and a boson star.
Why it matters
The discovery demonstrates that the symmetric configuration of hairy black holes is an unstable equilibrium that collapses when non-spherical dynamics are introduced. This finding challenges previous assumptions about the stability of these theoretical objects.
The fission process occurs when gravitational attraction competes with electromagnetic repulsion in a system where equilibrium is unstable. Researchers used numerical simulations to track how configurations evolve once a disturbance disrupts the boson star.
The players
University of Aveiro
This Portuguese research institution is where the team of physicists conducted their simulation work on black hole dynamics.
The details
Numerical simulations revealed that hairy black holes become unstable once non-spherical dynamics are permitted, leading them to shed their scalar hair. This transition results in the formation of a distinct bald black hole and an independent boson star.
Timeline
The research findings were published on September 29, 2026.
The Big Picture
This discovery significantly shifts the trajectory of theoretical astrophysics by proving that certain hairy black hole configurations are inherently unstable. The findings suggest that future research into gravitational-wave signatures could provide observable evidence for this fission process.
While these findings currently apply to theoretical physics, confirming the fission process could eventually help scientists identify unique gravitational-wave signals. Such detections would provide a new tool for observing extreme phenomena in the distant universe.
The takeaway
The study suggests that many theoretical black hole models may require reassessment due to inherent instabilities in their scalar fields. Researchers are now looking for potential gravitational-wave signatures that could confirm these theoretical decay events in deep space.
Further reading
For more on the latest research in the field, see our coverage of Physics.
Source note: This article includes information reported by ScienceAlert.
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