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Magnetic fields in quiescent prominencesThe origin of the axial fields in high-latitude quiescent prominences is considered. The fact that almost all quiescent prominences obey the same hemisphere-dependent rule strongly suggests that the solar differential rotation plays an important role in producing the axial fields. However, the observations are inconsistent with the hypothesis that the axial fields are produced by differential rotation acting on an existing coronal magnetic field. Several possible explanations for this discrepancy are considered. The possibility that the sign of the axial field depends on the topology of the magnetic field in which the prominence is embedded is examined, as is the possibility that the neutral line is tilted with respect to the east-west direction, so that differential rotation causes the neutral line also to rotate with time. The possibility that the axial fields of quiescent prominences have their origin below the solar surface is also considered.
Document ID
19900061878
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Van Ballegooijen, A. A.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Martens, P. C. H.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Date Acquired
August 14, 2013
Publication Date
September 20, 1990
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 361
ISSN: 0004-637X
Subject Category
Solar Physics
Accession Number
90A48933
Funding Number(s)
CONTRACT_GRANT: NAGW-249
CONTRACT_GRANT: NAGW-112
Distribution Limits
Public
Copyright
Other

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