Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 6, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2020/06/032
Keywords
cosmological neutrinos; cosmological parameters from LSS; cosmological simulations
Funding
- Cosmology and Astroparticle Student and Postdoc Exchange Network (CASPEN)
- Simons Foundation
- INDARK PD51 INFN grant
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Nonlinear objects like halos and voids exhibit a scale-dependent bias on linear scales in massive neutrino cosmologies. The shape of this scale-dependent bias is a unique signature of the neutrino masses, but the amplitude of the signal is generally small, of the order of f(nu), the contribution of neutrinos to the total matter content (less than or similar to 1%). In this paper, we demonstrate for the first time how the strength of this signal can be substantially enhanced by using information about the halo environment at a range of scales. This enhancement is achieved by using certain combinations of the large scale Cold Dark Matter and total matter environments of halos, both of which are measurable from galaxy clustering and weak lensing surveys.
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