Observational tracers of the alpha-effect in the sun versus radius and latitude

Details Observational tracers of the alpha-effect in the sun versus radius and latitude Observational tracers of the alpha-effect in the sun versus radius and latitude

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..815k&link_type=abstract

In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze

Physics

Magnetic Fields In Solar Active Regions, Current Helicity, Alpha-Effect

Scientific paper

We study spatial distribution of the alpha-effect by analysis of systematic observations of current helicity and twist of magnetic fields in solar active regions. We have shown that the alpha-effect is antisymmetric over the solar equator. Identifying signatures of the alpha-effect with partial rotation of active regions and with account of the internal rotation law within the solar convection zone obtained by means of helioseismology, we deduce distribution of the alpha-effect over depth. We found that this effect changes its value and sign near the bottom of the convection zone which is in accord with theoretical studies and numerical simulations.

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