Antisymmetric tensor influence on charged black hole lensing phenomena and time delay
arXiv:2406.11582 · doi:10.1016/j.jheap.2025.100401
Abstract
In this work, we investigate the gravitational lensing of a charged black hole (spherically symmetric) within the context of Lorentz violation triggered by an antisymmetric tensor field. Our calculations consider two different scenarios: the weak and strong deflection limits. For the weak deflection limit, we employ the Gauss-Bonnet theorem to obtain our results. In the strong deflection limit, we utilize the Tsukamoto methodology, which provides measurable outcomes such as relativistic image positions and magnifications. Applying the latter methodology, we analyze the gravitational lensing by Sagittarius and derive the related observables, which are expressed as functions of the Lorentz violation parameter. Finally, the time delay is addressed as well.
31 pages and 7 figures -- version accepted for publication in Journal of High Energy Astrophysics
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