Velocity Effects on the Deflection of Light by Gravitational Microlenses

Details Velocity Effects on the Deflection of Light by Gravitational Microlenses Velocity Effects on the Deflection of Light by Gravitational Microlenses

2004-10-07

arxiv.org/abs/astro-ph/0410183v1

Astrophys.J. 624 (2005) 28-33

Astronomy and Astrophysics

Astrophysics

13 pages with 2 figures; submitted to The Astrophysical Journal

Scientific paper

10.1086/428937

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.

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