Planck 2018 results
Free Access

Fig. 36.


Free electron fraction, xe(z), constrained from Planck using the “FlexKnots” method of Planck Collaboration IV (2020) and Millea & Bouchet (2018), along with astrophysical constraints, as tabulated in Bouwens et al. (2015), updated to include Greig et al. (2017), Bañados & Venemans (2018), Mason et al. (2018), and Davies et al. (2018).

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.