Cosmic Dark Radiation and Neutrinos

Figure 6

1D posterior of 𝑁_eff. The different cases reported in Table 2 are shown: black line corresponds to Planck + WP + highL, blue line to Planck + WP + highL + 𝐻₀, red line to Planck + WP + highL + BBNc, and magenta line to Planck + WP + highL + BBNc + 𝐻₀. Finally, the green line refers to the analysis that includes also a varying 𝑌_he.