Arch filaments associated with the formation of sunspots by umbral merging

Details Arch filaments associated with the formation of sunspots by umbral merging Arch filaments associated with the formation of sunspots by umbral merging

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987soph..114..239z&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 114, no. 2, 1987, p. 239-244.

Physics

5

Solar Magnetic Field, Solar Prominences, Sunspots, Buoyancy, Calcium, H Alpha Line, Magnetic Field Configurations

Scientific paper

The formation of a sunspot during the emergence of a new group is described. The spot forms from a cluster of small umbrae that do not converge. Rather, the individual umbrae enlarge and merge into a spot covering the same area. The formation of each umbra is accompanied by an intensification of the arch filament anchored in it. The formation of the sunspot produces no apparent change in the total field.

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