Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..173m&link_type=abstract
In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze
Physics
1
Solar Cycle, Magnetic Field, Zone Boundaries, 1.3 And 2.3-Year Oscillations
Scientific paper
We have computed and analyzed the average latitude per solar rotation of 36 zone boundaries of the large-scale magnetic field, which have been detected by Hα filaments and prominences during 1915-2000. We have found two types of the latitude oscillations of the zone boundaries with the quasi-periods of about 1.3 and 2.3-years (17 and 30 solar rotations). We consider that 1.3-year latitude periodicity of the filament bands connected with the same oscillations at the tachocline (Komm et al. (2000), Howe et al. (2001)). We have found the secular variations or an increase of a period of about 1.3-year oscillations from 1.1 year in 1915 up to 1.4 year in 2000. Second type of the latitude oscillations is about 2.3-year that concerns to quasi-biennial cycle. Properties of 1.3 and 2.3-year latitude oscillations of the filament bands during 1915-2000 are discussed.
Callebaut Dirk K.
Makarov Valentin I.
Tavastsherna K. S.
Tlatov Andrej G.
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