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Helicity Generation and Signature in Solar Atmosphere

Published online by Cambridge University Press:  30 March 2016

A. A. Pevtsov
A. A. Pevtsov*
Affiliation:
National Solar Observatory, Sunspot, NM 88349, U.S.A.

Abstract

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To fully understand the origin, evolution and topology of solar magnetic fields, one should comprehend their magnetic helicity. Observationally, non-zero helicity reveals itself in the patterns of electric currents inside active regions, superpenumbral sunspot whirls, the shape of coronal loops and the fine structure of chromospheric filaments. Some patterns may bear information about deep sub-photospheric processes (e.g., dynamo, turbulent convection). Others may originate at or near the photosphere. This presentation reviews the observations of magnetic and current helicity on the Sun, discusses the possible mechanisms of helicity generation, and compares them with the observations.

Type
I. Joint Discussions
Information
Highlights of Astronomy , Volume 13 , 2005 , pp. 89 - 93
Copyright
Copyright © Astronomical Society of Pacific 2005

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