Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...107..211s&link_type=abstract
Astronomy and Astrophysics, vol. 107, no. 1, Mar. 1982, p. 211-213.
Astronomy and Astrophysics
Astrophysics
9
Fine Structure, Penumbras, Solar Granulation, Solar Spectra, Sunspots, Umbras, High Resolution, Morphology, Solar Activity Effects
Scientific paper
Photographic analysis of a high resoluted white-light photograph of a big sunspot (Mount Wilson No. 20551) shows that there is a morphological relation between bright penumbral filaments and umbral dots. Within the umbra evidence is found for the existence of features which are considerably bigger than umbral dots and which may be identified with earlier found 'umbral granulation'.
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