Frequency shift of light in Kerr spacetime
General Relativity and Quantum Cosmology
2024-12-30 v3
Abstract
The frequency shift of light in the gravitational field generated by a rotating body is investigated. We consider the scenario in which both the light source and the observer are in motion. The frequency shift is calculated up to the second-order post-Minkowskian approximation via two different methods and the same result is achieved. The higher-order effects of the gravitational source's rotation on the frequency shift is obtained. Especially, when both the light source and the observer are located in the asymptotically flat region, an elegant formula is obtained, which can be easily used in the astronomical observations to determine the rotating gravitational source's mass and angular momentum.
Keywords
Cite
@article{arxiv.2306.10129,
title = {Frequency shift of light in Kerr spacetime},
author = {Chunhua Jiang and Bo Yang and Guansheng He and Wenbin Lin},
journal= {arXiv preprint arXiv:2306.10129},
year = {2024}
}