Physicists Model a Neutron Star Living Safely Inside a Black Hole
Standard physics breaks down inside black holes, but a new theoretical model wraps an event horizon around a neutron star instead of a crushing singularity.
Standard textbook physics hits a wall at the center of a black hole, yielding a point of infinite density where equations break down. Researchers Chen Tan and Yong-Qiang Wang from Lanzhou University published a paper on arXiv describing an alternative mathematical configuration they call a neutron star inside a black hole.
A neutron star packs roughly half a million Earth masses into a sphere just 10 to 20 kilometers wide. In the researchers' model, one of these stars sits entirely within an event horizon. The stellar surface rests at 8.5 kilometers, while the event horizon starts at 10 kilometers. Gravity forming this boundary comes jointly from the star and a surrounding halo of dark matter.
Using standard stellar structure equations, the team found that at a specific density band, space inverses just outside the star. This creates an event horizon enclosing the star without collapsing it into a singularity. The equations remain regular throughout.
However, the required dark matter densities far exceed anything astronomers actually expect to find in nature. The authors present a mathematical thought experiment rather than an observed object, showing that black hole interiors might be described without abandoning known physics entirely.
Source: habr
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