Black hole surrounded by a magnetic vortex in f(R)f(R) gravity

Jan 5, 2025
25 pages
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Abstract: (arXiv)
Modified Gravity Theories (MGTs) are extensions of General Relativity (GR) in its standard formulation. In light of this premise, we employ Heisenberg's non-perturbative approach to promote the three-dimensional Einstein-Hilbert theory to a modified f(R)f(R) gravity. Within this context, we investigate a cosmological system composed of a black hole (BH) surrounded by Maxwell-Higgs vortices, forming the BH-vortex system. In the case of linear f(R)f(R) gravity derived from quantum metric fluctuations, one shows the existence of a three-dimensional ring-like BH-vortex system with quantized magnetic flux. Within this system, one notes the BH at r=0r=0 and its event horizon at r=r0r= r_0, while the magnetic vortices are at r(r0,)r\in (r_0, \infty). A remarkable result is the constancy of the Bekenstein-Hawking temperature (THT_H), regardless of MGTs and vortex parameters. This invariance of THT_H suggests that the BH-vortex system reaches thermodynamic stability. Unlike the standard theory of Maxwell-Higgs vortices in flat spacetime, in f(R)f(R) gravity, the vortices suffer the influence of the BH's event horizon. This interaction induces perturbations in the magnetic vortex profile, forming cosmological ring-like magnetic structures.
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  • 25 pages, 5 captioned figures