School of Physics and Astronomy

Astronomy Unit Seminar -- The Status of Cosmology with the Square Kilometre Array in 2019

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15 March 2019

Time: 2:30 - 3:30pm
Speaker: Ian Harrison
Venue: GO Jones 610

The Square Kilometre Array (SKA) is a radio telescope being built in the next decade which will provide the deep, wide, high-resolution surveys necessary for cosmology. I will give an overview and reminder of the SKA's potential contributions to our understanding of cosmology. As an interferometric telescope operating at radio wavelengths, SKA will allow unique and novel observations, which will both mitigate systematics in measurements of cosmological parameters and enable new tests of the large-scale Universe. A large variety of surveys: weak lensing, galaxy clustering, galaxy velocity, unresolved intensity maps and transients will all have cosmological applications. All of these will require work in the intervening years to understand the radio sky and radio data analysis to the level necessary for precision cosmology, and I will discuss some of this ongoing work.
As well as giving a broad overview of the telescope and the full cosmology science case as it exists in 2019, I will also zoom in on two particular very different applications: weak gravitational lensing surveys, and gravitational wave standard siren measurements with radio transients.