Cosmic Dark Radiation and Neutrinos

Figure 9

68% and 95% c.l. 2D marginalized posterior in the ∑𝑚_𝜈−𝑁_eff plane. Blue contours refer to the constraints from the combination of Planck + WP + highL and red contours include also 𝐻₀ (a), BOSS DR9 (b), and 𝐻₀ and BOSS DR9 (c).

(a)

(b)

(c)