Abstract
AbstractIn this manuscript, we present an alternative method for calculating null geodesics in General Static Isotropic Metrics in General Relativity and Extended Theories of Gravity. By applying a conformal transformation, we are able to consider an analogue gravity model, where curvature is encoded in the dielectric and magnetic properties of a medium. In other words, we pass from curved to flat space-times, where instead of the Einstein field equations, the Maxwell equations are solved. Within this geometrical background, the photon geodesics are calculated. Then, given different black hole and wormhole metrics, we apply this method obtaining an excellent agreement with respect to the exact solutions in the original gravity framework by committing angular deviations below $$3^{\circ }$$
3
∘
. Finally, we provide the image of a Schwarzschild black hole surrounded by a thin accretion disk, and the apparent image of a Morris and Thorne-like wormhole within an angular discrepancy below $$4^{\circ }$$
4
∘
.
Publisher
Springer Science and Business Media LLC
Subject
Physics and Astronomy (miscellaneous),Engineering (miscellaneous)
Reference31 articles.
1. A.S. Eddington, Space, Time and Gravitation: An Outline of the General Relativity Theory (Cambridge University Press, Cambridge, 1987)
2. J. Plebanski, Phys. Rev. 118(5), 1396 (1960)
3. K. Akiyama et al., Astrophys. J. Lett. 875, L1 (2019). https://doi.org/10.3847/2041-8213/ab0ec7
4. K. Akiyama et al., Astrophys. J. Lett. 875(1), L4 (2019). https://doi.org/10.3847/2041-8213/ab0e85
5. Event Horizon Telescope Collaboration, K. Akiyama et al., ApJ 875(1), L5 (2019). https://doi.org/10.3847/2041-8213/ab0f43
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献