Probing the primordial Universe with MeerKAT and DES

• DOI: 10.1093/mnras/stw3248
• Publication Date: 2016-12-12T15:12:00Z
• Authors: José Fonseca; Roy Maartens; Mário G. Santos
• Keywords: /dk/atira/pure/core/subjects/cosmology; Cosmology and Gravitation; Cosmology and Nongalactic Astrophysics (astro-ph.CO); RCUK; FOS: Physical sciences; cosmology: large-scale structure of the Universe; 01 natural sciences; large-scale structure of the Universe [cosmology]; 0103 physical sciences; astro-ph.CO; ST/N000668/1; STFC; Astrophysics - Cosmology and Nongalactic Astrophysics

It is usually assumed that we will need to wait until next-generation surveys like Euclid, LSST and SKA, in order improve on the current best constraints primordial non-Gaussianity from Planck experiment. We show two contemporary surveys, with SKA precursor MeerKAT Dark Energy Survey (DES), can be combined using multi-tracer technique deliver an accuracy measurement of $f_{\rm NL}$ up three times better than Planck.