We present the strongest current cosmological upper limit on the neutrino mass of \sum m _ { \nu } < 0.18 \mathrm { eV } ( 95 % confidence ) .
It is obtained by adding observations of the large-scale matter power spectrum from the WiggleZ Dark Energy Survey to observations of the cosmic microwave background data from the Planck surveyor , and measurements of the baryon acoustic oscillation scale .
The limit is highly sensitive to the priors and assumptions about the neutrino scenario .
We explore scenarios with neutrino masses close to the upper limit ( degenerate masses ) , neutrino masses close to the lower limit where the hierarchy plays a role , and addition of massive or massless sterile species .