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Reconstruction of magnetic field surges to the poles from sunspot impulses

Published online by Cambridge University Press:  05 July 2012

Nadezhda V. Zolotova  and
Dmitri I. Ponyavin
Nadezhda V. Zolotova
Affiliation:
Institute of Physics, St. Petersburg State University, Ulyanovskaya ul.1, Petrodvorets, St. Petersburg, Russia, 198504 email: [email protected]
Dmitri I. Ponyavin
Affiliation:
Institute of Physics, St. Petersburg State University, Ulyanovskaya ul.1, Petrodvorets, St. Petersburg, Russia, 198504 email: [email protected]
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Abstract

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The time-latitude diagram of the photospheric magnetic field of the Sun during 1975-2011 (Kitt Peak NSO, SOLIS NSO, SOHO MDI data) is analyzed using Gnevysvev's idea of impulsed structure of sunspot cycle and a flux transport concept. It is demonstrated that poleward migrations of magnetic trailing polarities are closely associated with the impulses of sunspot activity. We use a fitting procedure to reconstruct the sunspot impulses and poleward magnetic field surges. We compare our results for Cycle 22 model with the time-latitude diagram of the photospheric magnetic field of the Sun.

Keywords

Sun: activitySun: magnetic fields(Sun:) sunspots
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S286: Comparative Magnetic Minima: Characterizing quiet times in the Sun and Stars , October 2011 , pp. 88 - 92
Copyright
Copyright © International Astronomical Union 2012

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