2005
DOI: 10.1017/s1539299600015203
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Magnetic Helicity in Sigmoids, Coronal Mass Ejections and Magnetic Clouds

Abstract: Abstract.Sigmoids, coronal mass ejections (CMEs) and magnetic clouds (MCs) all show signatures of twisted and writhing magnetic fields. CMEs are often associated with MCs, whose fields are regularly mapped with sensitive magnetometers. These measurements reveal that MC fields are helical, and each MC carries magnetic helicity away from the sun. It is more difficult to determine the magnetic helicity of the corresponding features on the sun. This presentation surveys recent work on helicity in solar features, f… Show more

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