We present a method of calculating the strong-field gravitational lensing caused by many analytic and numerical spacetimes. We use this procedure to calculate the distortion caused by isolated black holes and by numerically evolved black hole binaries. We produce both demonstrative images illustrating details of the spatial distortion and realistic images of collections of stars taking both lensing amplification and redshift into account. On large scales the lensing from inspiraling binaries resembles that of single black holes, but on small scales the resulting images show complex and in some cases self-similar structure across different angular scales.
@article{arxiv.1410.7775,
title = {What does a binary black hole merger look like?},
author = {Andy Bohn and William Throwe and François Hébert and Katherine Henriksson and Darius Bunandar and Nicholas W. Taylor and Mark A. Scheel},
journal= {arXiv preprint arXiv:1410.7775},
year = {2015}
}
Comments
10 pages, 12 figures. Supplementary images and movies can be found at http://www.black-holes.org/the-science-numerical-relativity/numerical-relativity/gravitational-lensing