Primordial helium and emission-line galaxies

Recent observations of 13 low luminosity emission-line galaxies give no convincing evidence for a ΔY versus ΔZ correlations. The observed scatter is likely to result from uncontrolled parameters in the analysis rather than simple observational errors. The results taken with the best available data in the literature suggest that Ysub(p) = 0.240+-0.015. If we admit that baryons provide most of the mass which binds binary and small groups of galaxies, this mass fraction Ysub(p) constraints the number of 2 component neutrino species to Nsub(ν)<=4 and remove the contradictions raised by previous low Ysub(p) determinations