https://doi.org/10.1140/epjc/s10052-020-8205-2
Regular Article - Theoretical Physics
Time delay of photons coupled to Weyl tensor in a regular phantom black hole
1
School of Astronomy and Space Science, Nanjing University, Nanjing, 210023, China
2
Key Laboratory of Modern Astronomy and Astrophysics, Nanjing University, Ministry of Education, Nanjing, 210023, China
* e-mail: yixie@nju.edu.cn
Received:
9
May
2020
Accepted:
4
July
2020
Published online:
15
July
2020
Time delay of the photons coupled to the Weyl tensor in a regular phantom black hole is investigated in both weak and strong deflection gravitational lensing. We find that the time delay in the weak deflection lensing strongly depends on the phantom hair while the delay in the strong deflection lensing is significantly affected by the hair and the strength of the coupling. We suggest that it is necessary to measure these two kind of time signals for fully understanding and distinguishing such an interaction beyond the standard Einstein–Maxwell theory.
© The Author(s), 2020
