Secondary polar zone of prominence activity revealed from Lomnicky Stit observations

Details Secondary polar zone of prominence activity revealed from Lomnicky Stit observations Secondary polar zone of prominence activity revealed from Lomnicky Stit observations

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...281..241d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 281, no. 1, p. 241-244

Astronomy and Astrophysics

Astrophysics

4

Polar Regions, Solar Cycles, Solar Magnetic Field, Solar Prominences, Coronagraphs, Spatial Distribution, Spectroheliographs, Sunspots, Temporal Distribution

Scientific paper

The time-latitude distribution of the number and area of prominences observed at Lomnicky Stit Coronal Station during the period 1967-1991 has been studied in order to check if multiple structure of the prominence polar zones can be traced. The results obtained show that a secondary polar zone appears in the northern hemisphere during the maximum phase of solar cycle 20, which confirms the result obtained by Waldmeier (1973). During the ascending phase of solar cycle 22 a triple structure developed in the southern hemisphere. No multiple structure is observed during solar cycle 21.

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