Charged, rotating black holes in Einstein-Maxwell-dilaton theory
Abstract
Abstract The asymptotically flat, electrically charged, rotating black holes (BHs) in Einstein-Maxwell-dilaton (EMd) theory are known in closed form for only two particular values of the dilaton coupling constant γ : the Einstein-Maxwell coupling ( γ = 0), corresponding to the Kerr-Newman (KN) solution, and the Kaluza-Klein coupling ( γ = √(3)). Rotating solutions with arbitrary γ are known only in the slow-rotation or weakly charged limits. In this work, we numerically construct such EMd BHs with arbitrary γ . We present an overview of the parameter space of the solutions for illustrative values of γ together with a study of their basic properties. The solutions are in general KN-like; there are however, new features. The data suggest that the spinning solutions with 0< γ √(3), in which case, moreover, we have found hints of BH non-uniqueness for the same global charges.
Fields of Study & Subjects
Black Holes and Theoretical Physics
Astrophysical Phenomena and Observations
Pulsars and Gravitational Waves Research
Publication details
- Journal / source
- Journal of Cosmology and Astroparticle Physics
- Publisher
- IOP Publishing
- Volume
- 2026
- Issue
- 04
- Pages
- 005–005
- Publication date
- 1 April 2026
- Language
- EN