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Spawning and Shedding Helical Magnetic Fields in the Solar Atmosphere
Author(s) -
Rust D. M.
Publication year - 1994
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/94gl00003
Subject(s) - photosphere , physics , interplanetary magnetic field , magnetic helicity , solar flare , helicity , sunspot , coronal mass ejection , southern hemisphere , protein filament , astrophysics , magnetic field , solar cycle 23 , astronomy , solar wind , magnetohydrodynamics , particle physics , quantum mechanics , biology , genetics
Measurements of the helical fields in interplanetary magnetic clouds have corroborated recent evidence that the magnetic fields in solar filaments in the northern and southern hemispheres of the Sun are preferentially left‐handed and right‐handed heliform, respectively. In 13 cases out of 16, the chirality of magnetic clouds passing Earth about 4 days after a filament eruption or an eruptive solar flare corresponded to the predominant chirality in the hemisphere originating the solar event. Active regions and sunspots also indicate that helicity is segregated by hemisphere. Torque due to an equatorial jet stream beneath the photosphere may twist the fields.