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 fNL that is up to three times better than Planck.
@article{arxiv.1611.01322,
title = {Probing the primordial Universe with MeerKAT and DES},
author = {José Fonseca and Roy Maartens and Mário G. Santos},
journal= {arXiv preprint arXiv:1611.01322},
year = {2017}
}
Comments
7 pages, 5 figures, 1 table. We now marginalise over the bias, and ensure that we exclude nonlinear scales, leading to small quantitative corrections. Version accepted by MNRAS