Speaker
Description
A new two-parameter, static and spherically symmetric regular geometry is proposed, which, for specific parameter choices, represents a geodesically complete, regular black hole. However, unlike most regular black holes which have Schwarzschild spacetime as their singular limit, our spacetime reduces to a singular, mutated Reissner–Nordström geometry, for a particular choice of parameters. The required matter (within the framework of General Relativity (GR)) violates the energy conditions, but not in the entire domain of the radial coordinate. Despite energy condition violation, we are able to construct a viable source for our geometry, which involves a nonlinear magnetic monopole in a chosen version of nonlinear electrodynamics. An alternative source in braneworld gravity is also suggested. Further, we obtain the shadow profile for our geometry and try to estimate the metric parameters using recent observational results from the EHT collaboration.
Based on: A. Kar and S. Kar, arxiv:2308.12155
| anjankar.phys@gmail.com | |
| Affiliation | Department of Physics, IIT Kharagpur |
