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| Formato: | Recurso digital |
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Zenodo
2025
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| Acceso en línea: | https://doi.org/10.5281/zenodo.17007399 |
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- <p>We present the Ivkovski ansatz for a Semi-Black Hole (SBH): an anisotropic generalization of<br>Schwarzschild with an angular mass profile m(θ), direction-dependent horizons rh(θ) = 2m(θ), and<br>accompanying consequences for photon orbits, surface gravity, and the effective stress-energy sourcing the geometry.</p> <p>The Semi-Black Hole (SBH) model proposes that anisotropic collapse of dark matter can create partial<br>event horizons—regions where the escape velocity exceeds the speed of light only in certain directions.<br>Unlike classical black holes, these horizons are irregularly shaped and dynamically evolving.<br>SBHs retain dark matter, preventing complete Hawking evaporation, but still emit Hawking radiation.<br>This allows unique particle-interaction effects inside the SBH, such as charge annihilation potentially<br>producing photons. The model predicts distinctive gravitational lensing, anisotropic radiation patterns, tests for the quanta of dark matter, generalisation of the no hair theoreme and long-term stability as a form of dark matter black hole.</p>