Gravitational Lensing and Gravitomagnetic Time Delay
General Relativity and Quantum Cosmology
2007-05-23 v1
Abstract
We derive the delay in travel time of photons due to the spin of a body both inside a rotating shell and outside a rotating body. We then show that this time delay by the spin of an astrophysical object might be detected in different images of the same source by gravitational lensing; it might be relevant in the determination of the Hubble constant using accurate measurements of the time delay between the images of some gravitational lens systems. The measurement of the spin-time-delay might also provide a further observable to estimate the dark matter content in galaxies, clusters, or super-clusters of galaxies.
Cite
@article{arxiv.gr-qc/0301030,
title = {Gravitational Lensing and Gravitomagnetic Time Delay},
author = {Ignazio Ciufolini and Franco Ricci},
journal= {arXiv preprint arXiv:gr-qc/0301030},
year = {2007}
}
Comments
Submitted to Physical Review Letters: 8 April 2002. Resubmitted, revised: 31 July 2002; 31 December 2002