http://arxiv.org/abs/1807.02470
Future large-scale spectroscopic astronomical surveys, e.g. Euclid, will enable the construction of vast new catalogues of clusters and voids in the galaxy distribution. By combining the constraining power of both cluster and void number counts, such surveys could place stringent simultaneous limits on the sum of neutrino masses $M_\nu$ and the dark energy equation of state $w(z) = w_0 + w_a z/(1+z)$. For minimal normal-hierarchy neutrino masses, we forecast that Euclid cluster + void counts could measure $\sigma(M_\nu) \lesssim 15$ meV, $\sigma(w_0) \lesssim 0.02$, $\sigma(w_a) \lesssim 0.06$, independent of other data. This is competitive with leading probes in future surveys, and could reject an inverted neutrino mass hierarchy.
M. Sahlén
Mon, 9 Jul 18
31/43
Comments: 5 pages, 3 figures, 1 table. Comments welcome
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