2018/01/01 by D. Pugliese, H. Quevedo
Physics and Astronomy · #Angular momentum #Astrophysical Phenomena and Observations #Black hole (networking) #Limiting #Naked singularity #Pulsars and Gravitational Waves Research #Quantum Electrodynamics and Casimir Effect #Ring singularity #Rotating black hole #Singularity #Spin (aerodynamics) #astro-ph.HE #gr-qc
paper · pdf · doi:10.1140/epjc/s10052-018-5569-7
20 pages, 13 multi-panels figures, 2 tables
openalex publication_date 2018/01/01 · arxiv created 2018/01/18 · openalex created_date 2018/01/26 · arxiv updated 2018/03/14 · openalex updated_date 2026/08/05
We perform a detailed analysis of the properties of stationary observers located on the equatorial plane of the ergosphere in a Kerr spacetime, including light-surfaces. This study highlights crucial differences between black hole and the super-spinner sources. In the case of Kerr naked singularities, the results allow us to distinguish between “weak” and “strong ” singularities, corresponding to spin values close to or distant from the limiting case of extreme black holes, respectively. We derive important limiting angular frequencies for naked singularities. We especially study very weak singularities as resulting from the spin variation of black holes. We also explore the main properties of zero angular momentum observers for different classes of black hole and naked singularity spacetimes.