Astrophysics

The Life and Death of Stars That Capture Primordial Black Holes

Ore Gottlieb, Matteo Cantiello, Cameron Norton, Ken Van Tilburg, Matthew Kleban

Featured June 14, 2026

This analysis was generated by SciGrove. Upload your own PDFs or enter a DOI — and get the same AI breakdown on any paper.

Get started

AI-generated analysis — This is SciGrove's AI interpretation of the paper, not peer-reviewed content. Always refer to the original paper.

Simply

When a star captures a tiny, dense primordial black hole, it can either be eaten from the inside out quietly or explode violently if the black hole forms a spinning accretion disk.

In depth

The paper establishes a global framework for the evolution of Hawking stars, which are main-sequence stars that have captured a primordial black hole (PBH). The study demonstrates that the system's fate bifurcates based on whether the PBH can form a rotationally supported accretion disk before consuming the host star. If a disk forms, the resulting magnetic feedback and relativistic jets trigger an explosive disruption of the star, whereas otherwise, the PBH consumes the star quietly.

Key Takeaways

1
Three-body interactions with planetary companions are the primary mechanism for capturing PBHs into bound orbits within stars.
2
The transition to an explosive fate is governed by the disk-formation threshold, which depends on the host star's rotation history and the PBH mass.
3
Explosive Hawking stars produce distinct multi-component transients, including a shock breakout flash and a subsequent UV/blue cooling signal.

Conceptual Flow

HIGH LEVEL

Methodology: The Evolutionary Path

The researchers tracked how a captured black hole grows inside a star and determines if it triggers an explosion.

Captured Black Hole

Stellar Core

Accretion and Growth

Quiet Death

Explosive Disruption

Results: The Impact

The study shows that these stars can create bright flashes of light that telescopes might see.

Explosive Disruption

Produces Transients

Light Flash

Radio Glow