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Astro & GW Colloquium

The Astrometric Effect of Gravitational Waves

Speaker: Dr Christoper Moore (University of Cambridge)
Date: Wednesday 24 October 2018
Time: 14:00
Venue: Queens Buildings N/3.28

Gravitational waves (GWs) cause the apparent position of distant stars to change periodically with a characteristic pattern on the sky. This effect can be used to search for low frequency GWs, either from individual sources or in the form of a stochastic background. Interest in this approach has increased following the successful launch and early data releases from the Gaia mission. In this talk I will describe the astrometric effect of GWs, explain how it can be utilised in the search for low frequency GWs, and how it can provide another test of general relativity by constraining the GW polarisation. Throughout the talk I will try to stress the complementarity of astrometry with pulsar timing searches for gravitational waves.