Free Access
Fig. 24
Constraints on ns for ΛCDM models with non-standard relativistic species, Neff, (upper) and helium fraction, YP, (lower). We show 68% and 95% contours for various data combinations. Note the tightening of the constraints with the addition of BAO data.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.