Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976azh....53.1046b&link_type=abstract
Astronomicheskii Zhurnal, vol. 53, Sept.-Oct. 1976, p. 1046-1051. In Russian.
Astronomy and Astrophysics
Astronomy
Solar Activity, Sunspots, Northern Hemisphere, Periodic Variations, Phase Shift, Southern Hemisphere, Stellar Models
Scientific paper
The areas of sunspots by the years of the 19th and 20th solar cycles (from 1953 to 1972) were distributed over 90-deg and 30-deg intervals of heliocentric longitude with a subdivision into high-latitude and low-latitude spots. It is shown that, in accordance with Waldmeier's conclusion, the 19th and 20th cycles have opposite signs of the phase shift. A difference was noted in the longitudinal distribution of sunspots in years near solar maximum and years just after minimum: in the northern hemisphere on the ascending branch of the cycle the sunspot areas were concentrated near a single longitude (about 200 deg for high-latitude spots); near maximum the areas were distributed into two segments with centers near 90 deg and 270 deg. In some years which are equidistant from the beginning of a cycle the distribution of sunspots in longitude is qualitatively different in both cycles, especially in the northern hemisphere.
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