Strong Gravitational Lensing of Quasi-Kerr Compact Object with Arbitrary Quadrupole Moments
Abstract
We study the strong gravitational lensing on the equatorial plane of a quasi-Kerr compact object with arbitrary quadrupole moments which can be used to model the super-massive central object of the galaxy. We find that, when the quadrupolar correction parameter takes the positive (negative) value, the photon-sphere radius , the minimum impact parameter , the coefficient , the relative magnitudes and the angular position of the relativistic images are larger (smaller) than the results obtained in the Kerr black hole, but the coefficient , the deflection angle and the angular separation are smaller (larger) than that in the Kerr black hole. These features may offer a way to probe special properties for some rotating compact objects by the astronomical instruments in the future.
Keywords
Cite
@article{arxiv.1208.1072,
title = {Strong Gravitational Lensing of Quasi-Kerr Compact Object with Arbitrary Quadrupole Moments},
author = {Changqing Liu and Songbai Chen and Jiliang Jing},
journal= {arXiv preprint arXiv:1208.1072},
year = {2015}
}
Comments
17 pages, 4 figures. Accepted for publication in JHEP