From the three-dimensional WiggleZ galaxy map, the team measured a statistical number related to the number of galaxy pairs with a given separation. The tail of this distribution depends theoretically on the neutrino mass as illustrated by the different coloured lines. The more massive the neutrinos, the more they suppress the formation of galaxy pairs with short distances (large inverse distances measured in inverse mega-parsec).
Credit: NASA, ESA and M. Livio and the Hubble Heritage Team (STScI/AURA)

The lightest known subatomic particles in the universe are now able to be more accurately scrutinised, in light of new astronomic research two years in the making.

30 April 2012