The WiggleZ Dark Energy Survey: Cosmological neutrino mass constraint from blue high-redshift galaxies

TL;DR

This study uses the WiggleZ galaxy survey combined with CMB data to place the tightest spectroscopic galaxy-based upper limit on the sum of neutrino masses, constraining it to below 0.29 eV.

Contribution

It provides the most stringent neutrino mass constraint from spectroscopic galaxy surveys by leveraging high-redshift blue galaxies less affected by systematics.

Findings

Upper limit on neutrino mass: 0.60 eV with WiggleZ+WMAP.

Combined data with priors tightens limit to 0.29 eV.

First strong neutrino mass constraint from spectroscopic galaxy survey.

Abstract

The absolute neutrino mass scale is currently unknown, but can be constrained from cosmology. The WiggleZ high redshift star-forming blue galaxy sample is less sensitive to systematics from non-linear structure formation, redshift-space distortions and galaxy bias than previous surveys. We obtain a upper limit on the sum of neutrino masses of 0.60eV (95% confidence) for WiggleZ+Wilkinson Microwave Anisotropy Probe. Combining with priors on the Hubble Parameter and the baryon acoustic oscillation scale gives an upper limit of 0.29eV, which is the strongest neutrino mass constraint derived from spectroscopic galaxy redshift surveys.