Velocity Effects on the Deflection of Light by Gravitational Microlenses
Astrophysics
2009-11-10 v1
Abstract
We study the influence of general lens and source velocities on the gravitational deflection of light by single and two-point-mass microlenses with general axis orientation. We demonstrate that in all cases the lens equation preserves its form exactly. However, its parameters -- the Einstein radius and the binary-lens separation -- are influenced by the lens velocity. In Galactic microlensing settings the velocity mainly affects the inferred separation for wide binary-star or star+planet microlenses oriented close to the line of sight. We briefly discuss the case of lenses moving with highly relativistic velocities.
Cite
@article{arxiv.astro-ph/0410183,
title = {Velocity Effects on the Deflection of Light by Gravitational Microlenses},
author = {David Heyrovsky},
journal= {arXiv preprint arXiv:astro-ph/0410183},
year = {2009}
}
Comments
13 pages with 2 figures; submitted to The Astrophysical Journal