Cosmology from EMU

Tue, 06/10/2015 - 12:00 - 13:00
Ray Morris

The Evolutionary Map of the Universe (EMU) survey is one of the two key projects primarily driving the design and construction of the new $165m Australian SKA Pathfinder telescope. EMU will increase the number of known radio sources from about 2 million to about 70 million, with a median redshift of about 1.4. The sheer volume of radio sources enables a number of tests of cosmology and fundamental physics that provide an independent measurement to complement those of other cosmological surveys such as BOSS and DES. Here I will describe the EMU survey and the limits that we expect to be able to place on the measured parameters, and will discuss the sources of uncertainty that need to be pinned down before we can make definitive measurements. Particularly interesting are the likely complementarities between MIGHTEE (the Meerkat continuum survey) and EMU (the ASKAP continuum survey), and potential projects which capitalise on the strengths of both Meerkat and ASKAP to deliver results which would be unachievable by either on its own.