English

Geometrically Regular Black Holes with Hedgehog Scalar Hair

General Relativity and Quantum Cosmology 2026-04-20 v1 High Energy Astrophysical Phenomena High Energy Physics - Theory

Abstract

We study a simple theory based on general relativity, minimally coupled to a constrained scalar triplet and to an auxiliary non-propagating three-form sector. Within a spherically symmetric hedgehog ansatz, the theory admits a continuous exact family of asymptotically flat geometrically regular black holes. For a simple choice of kinetic function, the solutions possess a de Sitter core and approach Schwarzschild with the first correction appearing only at order r4r^{-4}. We analyse their horizon structure, thermodynamics, and main strong-field properties. The black holes carry topological scalar hair and a continuous secondary parameter, but no scalar charge. The regularity established here is geometric: the curvature invariants remain finite, although the matter sector is not completely smooth at the centre.

Keywords

Cite

@article{arxiv.2604.15758,
  title  = {Geometrically Regular Black Holes with Hedgehog Scalar Hair},
  author = {Sebastian Bahamonde},
  journal= {arXiv preprint arXiv:2604.15758},
  year   = {2026}
}

Comments

14 pages, 3 figures