Second Order Kerr-Newman Time Delay
General Relativity and Quantum Cosmology
2020-07-22 v1
Abstract
The explicit form for the post-Newtonian gravitational time delay of light signals propagating on the equatorial plane of a Kerr-Newman black hole is derived. Based on the null geodesic in Kerr-Newman spacetime, we adopt the iterative method to calculate the time delay. Our result reduces to the previous formulation for Kerr black hole if we drop off the contribution from the electrical charge. Our time-delay formula for the Reissner-Nordstr\"{o}m geometry is different from the previous publication [Phys. Rev. D 69, 023002 (2004)], in which the largest second-order contribution to the time delay is missing.
Cite
@article{arxiv.2007.10566,
title = {Second Order Kerr-Newman Time Delay},
author = {Guansheng He and Wenbin Lin},
journal= {arXiv preprint arXiv:2007.10566},
year = {2020}
}