http://arxiv.org/abs/2210.17162
We model the reported existence of substantive magnetic fields in the vicinity of the central supermassive black holes in Sagitarius A* and Messier 87*, in terms of an axisymmetric, non-rotating Ernst-Melvin-Schwarzschild black hole spacetime with appropriate parameters. We compute the geodesic nodal-plane precession frequency for a test particle with mass, for such a spacetime, and obtain a non-vanishing result, surpassing earlier folklore that only axisymmetric spacetimes with rotation (non-vanishing Kerr parameter) can generate such a precession. We call this magnetic field-generated phenomenon Gravitational Larmor Precession. We discuss observational prospects of this precession in terms of available magnetic field strengths close to central black holes in galaxies.
C. Chakraborty and P. Majumdar
Tue, 1 Nov 22
89/100
Comments: 7 pages including 2 figures