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Variability of the differential rotation of the photospheric magnetic field through solar cycles

Published online by Cambridge University Press:  01 November 2006

Elena Gavryuseva
Elena Gavryuseva
Affiliation:
Istituto Nazionale di Astrofisica – Arcetri Astrophysical Observatory, Largo Enrico Fermi 5, I-50125 Florence, Italy email: [email protected]
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Abstract

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Differential rotational rate of the magnetic field measured in the photosphere was calculated and its temporal dependence was studied using two independent methods. It was found that the rotational rate has a character of torsional waves running to the equator with 11 year periodicity. At high latitudes the rotation is getting slower during minimum of activity when the field measured there is stronger.

Keywords

Sun: magnetic fieldsphotosphereactivity
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S233: Solar Activity and its Magnetic Origin , March 2006 , pp. 65 - 66
Copyright
© 2006 International Astronomical Union