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Friday 27 January 2017, 13:00-14:00
The Astrometric Effect of Gravitational Waves
- đ¤ Speaker: Christopher Moore (University of Cambridge)
- đ Date & Time: Friday 27 January 2017, 13:00 - 14:00
- đ Venue: Pavilion B Potter Room (B1.19)
Abstract
A gravitational wave incident on the Earth causes the apparent positions of distant objects (e.g. stars!) to change periodically. The GAIA spacecraft is currently measuring the positions of a billion stars with accuracies down to several tens of microarcseconds. Therefore the finalised GAIA data release will offer a new opportunity to search for low frequency gravitational waves in the range (1.0e-8 – 3.0e-7) Hz. I will discuss some of the challenges of searching for gravitational waves in large astrometric datasets, and the sensitivity which can be achieved with the GAIA dataset. I will also discuss the interesting effects that a gravitational wave burst with memory can have on the apparent positions of distant objects.
Series This talk is part of the DAMTP Friday GR Seminar series.
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