Strong gravitational field time delay for photons coupled to Weyl tensor in a Schwarzschild black hole

The European Physical Journal C

Yi Xie¹  Xu Lu¹  Feng-Wei Yang¹ 

[1] School of Astronomy and Space Science, Nanjing University, 210093, Nanjing, People’s Republic of China;Shanghai Key Laboratory of Space Navigation and Position Techniques, 200030, Shanghai, People’s Republic of China;Key Laboratory of Modern Astronomy and Astrophysics, Nanjing University, Ministry of Education, 210093, Nanjing, People’s Republic of China;

关键词: Black Hole;    Time Delay;    Polarization Direction;    Strong Field;    Weyl Tensor;   

DOI  :  10.1140/epjc/s10052-016-4218-2

来源: Springer

【 摘 要 】

We analyze strong gravitational field time delay for photons coupled to the Weyl tensor in a Schwarzschild black hole. By making use of the method of strong deflection limit, we find that these time delays between relativistic images are significantly affected by polarization directions of such a coupling. A practical problem about determination of the polarization direction by observations is investigated. It is found that if the first and second relativistic images can be resolved, the measurement of time delay can more effectively improve detectability of the polarization direction.

【 授权许可】

CC BY