Reconstruction of the Heliospheric Current Sheet Tilts Using Sunspot Numbers

Details Reconstruction of the Heliospheric Current Sheet Tilts Using Sunspot Numbers Reconstruction of the Heliospheric Current Sheet Tilts Using Sunspot Numbers

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006soph..233..277p&link_type=abstract

Solar Physics, Volume 233, Issue 2, pp.277-290

Physics

2

Scientific paper

We have investigated the correlation between the relative sunspot number and tilt of the heliospheric current sheet (HCS) in solar cycles 21 23. Strong and highly significant positive correlation (r > 0.8, P < 0.001) was found for corresponding data in the time interval from May 1976 through December 2004. Cross-correlation analysis does not reveal any time shift between the data sets. Reconstructed values of the HCS tilt, for the time interval before 1976, are found using sunspot numbers. To take different amplitude of solar cycles into account they were then normalized to zero in the minima of the solar activity and to average in solar cycles 21 23 maximal calculated HCS tilt in the maxima. These normalized reconstructed HCS data are compared with the angular positions of the brightest coronal streamers observed during total solar eclipses in 1870 2002, and their agreement is better for the minima of the solar activity than for the maxima.

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