The easy route to moving lenses
O. Wucknitz [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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