Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...199..318m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 199, no. 1-2, June 1988, p. 318-324.
Astronomy and Astrophysics
Astrophysics
8
Solar Activity, Solar Rotation, Sunspots, Position (Location), Solar Magnetic Field, Stellar Structure
Scientific paper
A relationship has been found between the position of sunspots at their maximum development and that of solar structures, before the appearance of the active centers. The difference in time between these two phenomena may vary between a few days and several rotations, but they never occur simultaneously. The sunspot coordinates at their maximum correspond either to the filament tip or to the plage border. This implies a local rigid rotation. It may be concluded, therefore, that there remains a structure, more durable than its superficial appearance, between the zone where the magnetic fields of the plage or of the filament involved are formed and the surface. The sunspot 'hits' against the previous magnetic structure (filament or plage), stops its development and changes the proper motion. This allows an understanding of the apparently arbitrary arrangement of the sunspots in the complex active center. Statistical analysis of sunspots in 1977 shows that 77 percent of these support the relationship proposed here.
Martres Marie-Josephe
Mouradian Zadig
Soru-Escaut I. I.
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