Challenging Black Hole Basics

At https://phys.org/news/2024-11-black-hole-kerr-solution-assumptions.html … another one to get the brain working overtime. We learn that the properties of black holes are now being challenged by a team from universities in Denmark, the Czech republic, Italy and New Zealand. The research is published at https://doi.org/10.1103/PhysRevLett.133.181402 … and on the arXiv preprint server at https://doi.org/10.48550/arxiv.2402.14913 … …  Black Holes, we are told, are simple gravitational objects – but capable of hiding mysteries that challenge our understanding of natural laws. Most observations made so far have focussed solely on their external characteristics, and the surrounding environment. The event horizon. Their internal nature is mostly unexplained. A new study examines various space time models that have been made over the years and are saying our understanding, or their misunderstanding, requires further investigation. The key insight is that the internal dynamics of black hole theory, which is largely uncharted, could radically transform our understanding of them. Even from an external perspective. The critical issue is the accumulation of energy within black holes. This would create instabilties, they allege, over relatively short timescales. The outcome being that black hole theory cannot stabilise mainstream geometry over long timescales. Hence, black hole dynamics cannot accurately describe what has been observed about black holes. Understanding the role of the instability is therefore essential to refine the theoretical models of black holes. Strong stuff.