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OATS-UNI/TS SEMINAR
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Speaker: Phil BULL (Oslo University)

Title: Cosmology with the SKA (square kilometer array)
Date: Wed, Aug 27, 2014
Time: 11:30
Venue: Villa Bazzoni
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Abstract: Neutral hydrogen is an excellent tracer of the cosmic matter density field, which can variously be used to probe dark energy, spatial curvature, modifications to general relativity, and even primordial non-Gaussianity. The SKA will be the most sophisticated hydrogen-detecting machine ever built, so with an eye on Phase 1 (due to start operation around 2020), I show what cosmological information we can expect to get out of it. While a large galaxy redshift survey will not be practical until Phase 2, a survey to map the intensity of the 21cm line out to redshift 3 will be surprisingly powerful, even giving Euclid a run for its money. I also discuss the prospects for measuring ultra-large scale relativistic effects, as well as some of the challenges that the intensity mapping methodology faces.
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Contact: Matteo Viel