A recent study has examined the potential benefits of using a rotating Hayward black hole model as an alternative to the conventional Kerr model. This research builds upon earlier discussions about non-singular black hole models, specifically the Hayward model, which was first proposed in 2006.
Published on the arXiv preprint server, the study highlights that Hayward black hole metrics share similarities with traditional Schwarzschild black hole metrics. Both are solutions to Einstein”s field equations; however, the Hayward model imposes an essential condition that prevents singularities, addressing various challenges associated with them.
Despite the apparent similarities, the authors suggest that there are distinct advantages to utilizing the Hayward model. The research team initiated their investigation with a rotating Hayward metric and incorporated a statistical simulation of a randomly fluctuating plasma field. This approach is akin to techniques employed by animators to create realistic water movements without delving into the complexities of fluid dynamics.
The researchers focused on simulating the flickering light from the accretion disk surrounding the black hole. In standard black hole models, this flickering often becomes indistinguishable due to blurring at observable levels, rendering it less useful for analyzing the dynamics of supermassive black holes. In contrast, the Hayward model maintains a degree of dynamism that allows these random fluctuations to interact meaningfully.
One notable observation related to the supermassive black hole M87* is the abrupt shifts in the magnetic field of its accretion disk. The exact mechanisms behind these rapid changes remain unclear, and traditional simulations are highly sensitive to initial conditions. However, the authors found that such magnetic field shifts occur naturally within the framework of the Hayward model.
This innovative approach provides a more accurate simulation of observable phenomena, though it does not delve into the fundamental physics behind the magnetic field variations. Nevertheless, the methodology could enhance our understanding of black hole dynamics, similar to how friction can be modeled without examining the atomic interactions on surfaces.
In summary, this research indicates that non-singular black hole models like the Hayward model may offer valuable insights into the behavior of black holes, challenging the conventional reliance on models that include singularities.
For more details, refer to the study by Sen Guo et al, titled “Image of a time-dependent rotating regular black hole,” available on arXiv.
