It is usually assumed that we will need to wait until next-generation surveys like Euclid, LSST and SKA, in order to improve on the current best constraints on primordial non-Gaussianity from the Planck experiment. We show that two contemporary surveys, with the SKA precursor MeerKAT and the Dark Energy Survey (DES), can be combined using the multi-tracer technique to deliver an accuracy on measurement of f NL that is up to three times better than Planck.
|Number of pages||7|
|Journal||Monthly Notices of the Royal Astronomical Society|
|Early online date||13 Dec 2016|
|Publication status||Published - Apr 2017|
- cosmology: large-scale structure of the Universe