Can origin of the 2400-year cycle of solar activity be caused by solar inertial motion?

I Charvátová

doi:10.1007/s005850050897

Abstract

A solar activity cycle of about 2400 years has until now been of uncertain origin. Recent results indicate it is caused by solar inertial motion. First we describe the 178.7-year basic cycle of solar motion. The longer cycle, over an 8000 year interval, is found to average 2402.2 years. This corresponds to the Jupiter/Heliocentre/Barycentre alignments (9.8855 Ã 243). Within each cycle an exceptional segment of 370 years has been found characterized by a looping pattern by a trefoil or quasitrefoil geometry. Solar activity, evidenced by 14C tree-ring proxies, shows the same pattern. Solar motion is computable in advance, so this provides a basis for future predictive assessments. The next 370-year segment will occur between AD 2240 and 2610.Key words: Solar physics (celestial mechanics)

Highlights

To ®nd a cause of solar variability is a key task for solar physics
These results show that the solar motion around the centre of mass of the solar system could be considered as the cause of solar variability
But a dynamic Sun should be taken into account. It appears that solar motion is the cause of the 2400-year cycle found in proxy of solar activity

Summary

Introduction

To ®nd a cause of solar variability is a key task for solar physics. It is an important subject for geophysics due to the inuence of this variability on the Earth's climate. A key to solution consists in the separation of solar motion into two basic orbital types (CharvaÂ tovaÂ , 1988, 1990a, b), see Fig. 2: the ordered (according to JS motion order, 117.3°, 19.86 years in a trefoil) and the disordered. It is of lower quality and before 1749 not even the monthly data are available This is not sucient to con®rm an exact response of the solar trefoil motion in the Wolf series. The basic cycle of 179 years in those two phenomena, the mutual relation between solar motion and solar activity became evident (Fig. 3d) It was shown (CharvaÂ tovaÂ , 1995b, c, 1997a) that the lengths of ®ve sunspot cycles (15±19) created by the Sun moving along the trefoil orbit where motion along one motion loop lasts 10 years (see Fig. 2, top), is stable and equal to 10.1 (~JS/2) years. The dominant period of 10.1 (JS/2) years was detected in sunspot numbers from the both trefoil intervals (CharvaÂ tovaÂ , 1990b, Fig. 4), in contrast to the longer dominant periods found for the other intervals, up to 11.9 (J) years detected for the Dalton minimum in solar activity (1790±1843) (CharvaÂ tovaÂ and StrÏ esÏ tõÂ k, 1994). Rabin et al (1986) and Wilson (1988) found that solar behaviour is bimodal, with modes being 10.1 and 11.9 years

The second basic cycle in solar motion

Conclusion