Free Access

Fig. 1

image

Examples of EBs and QSEBs in dataset 2 which targeted active region AR 11778 near the limb. The SST field is rotated over −59 deg from solar (X,Y). The full-field overview at left was taken with the blue (λ = 3953.7 Å) wide-band (FWHM 10 Å) camera. The axis divisions are arcsec from the lower-left corner. The four regions of interest A–D are shown enlarged as Hα-wing and blue wide-band cutout pairs at right, with corresponding arcsec coordinates. Regions A and B are in quiet areas, regions C and D sample the active region. Ellerman features are visible as bright flames in the Hα wings, respectively as smaller and weaker QSEBs in A and B and as larger and brighter EBs in C and D. Their relative brightness enhancements can be judged from the darkness of the surrounding granulation because each cutout panel is independently greyscaled. They are invisible in the blue wide-band images at right, in contrast to facular striations which are visible in both diagnostics, although appearing darker in Hα from the greyscaling needed to accommodate the bright Ellerman flames.

This figure is made of several images, please see below:

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.