Radial profiles of a) electron density; b) magnetic field; c) plasma frequency; d) electron-cyclotron frequency; e) ratio of the two frequencies; and f) Alfvén speed along the dashed line in Fig. 2a passing through the active region (red solid line) and the dashed line passing through the quiet Sun in Fig. 2a (purple dashed line). In panel e), the blue dotted line indicates the ωp/ Ωe = 1 level while the blue shaded box represents the height range in the corona where ECM emission is possible.
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.