Black holes and Abelian symmetry breaking

作者：Chagoya Javier; Niz Gustavo; Tasinato Gianmassimo^*

来源：Classical and Quantum Gravity, 2016, 33(17): 175007.

DOI：10.1088/0264-9381/33/17/175007

• black holes
• modified gravity
• vector-tensor theories

Black hole configurations offer insights on the nonlinear aspects of gravitational theories, and can suggest testable predictions for modifications of General Relativity. In this work, we examine exact black hole configurations in vector-tensor theories, originally proposed to explain dark energy by breaking the Abelian symmetry with a non-minimal coupling of the vector to gravity. We are able to evade the no-go theorems by Bekenstein on the existence of regular black holes in vector-tensor theories with Proca mass terms, and exhibit regular black hole solutions with a profile for the longitudinal vector polarisation, characterised by an additional charge. We analytically find the most general static, spherically symmetric black hole solutions with and without a cosmological constant, and study in some detail their features, such as how the geometry depends on the vector charges. We also include angular momentum, and find solutions describing slowly-rotating black holes. Finally, we extend some of these solutions to higher dimensions.

• 出版日期2016-9-8