Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986japa....7..113m&link_type=abstract
Journal of Astrophysics and Astronomy (ISSN 0250-6335), vol. 7, June 1986, p. 113-118.
Astronomy and Astrophysics
Astrophysics
9
Distribution (Property), Faculae, Latitude, Magnetic Poles, Periodic Variations, Solar Cycles, Solar Magnetic Field, Magnetic Field Inversions, Migration, Solar Activity
Scientific paper
Coordinates of polar faculae have been measured and processed using daily photoheliograms of the Kislovodsk Station of the Pulkovo Observatory with the final goal of studying their latitude distribution during the solar cycles 20-21. The first polar faculae emerge immediately after the polarity inversion of the solar magnetic field at the latitudes from 40 deg to 70 deg with the average phi approximately equal to 55 deg. The zone of the emergence of polar faculae migrates poleward during the period between the neighboring polarity inversions of the solar magnetic field. This migration is about 20 deg for 8 years, which corresponds to a velocity of 0.5 m/s. The maximum number of polar faculae was reached at the activity minimum (1975-1976). The last polar faculae were observed in the second half of 1978 at the latitudes from 70 deg to 80 deg.
Makarov Valentin I.
Makarova V. V.
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