Can we see a rotating gravitational lens?
Astrophysics
2009-10-31 v1
Abstract
It is known that the rotation of a gravitational lens affects properties of images. We consider an inverse problem: If the lens is dark, can we infer its rotation from the observed images? We find that, up to the first order in the gravitational constant G, a rotating lens is not distinguishable from a non-rotating one. The quadrupole contribution to the deflection angle is also calculated for a general, extended lens object.
Cite
@article{arxiv.astro-ph/0006157,
title = {Can we see a rotating gravitational lens?},
author = {Hideki Asada and Masumi Kasai},
journal= {arXiv preprint arXiv:astro-ph/0006157},
year = {2009}
}
Comments
8 pages (PTPTeX); accepted for publication in Prog. Theor. Phys