Download original image
Proton temperature as a function of the distance to the Sun. The three groups of points represent PSP E8 data, OMNI data (2018–2019–2020), and Ulysses data (2007). Points are colored as a function of the wind speed, with slow wind (300 km/s) in dark purple and fast wind (800 km/s) in yellow. Polytropic decay profiles are shown for the fast and slow winds and for γ = 1.1, 1.2, and base temperatures of 7 × 105 K (plain) or 1.1 × 105 K (dashed) at 0.1 au.
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.