The easy route to moving lenses

Poster presented at the symposium Three decades of gravitational lenses at JENAM 2009, 20-23 April 2009

O. Wucknitz [1]

  1. Argelander-Institut für Astronomie, Auf dem Hügel 71, 53121 Bonn, Germany

Abstract

Even though they are currently not of overwhelming astrophysical relevance, the effects of motion of a gravitational lens have been discussed in a number of publications. In spite of this, there still seems to be some confusion even about the first-order effects of radial motion of a lens. This contribution tries to clarify the situation by explaining that the scenarios discussed by different authors are in fact not equivalent, so that conflicting results have to be expected. The effects of purely radial motion can be described most easily via their influence on the angular size distances.




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