Brightness-temperature contribution functions (with maxima normalized to unity) at 3 mm a) and at 1 mm b) for a number of sunspot models including the model of Avrett (1981) (dot-dashed curve), of Severino et al. (1994) (dashed curve), and of Fontenla et al. (2009) (dotted curve). For comparison the contribution function for the model FAL − C is shown with a thin solid black line.
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.