Magnetic fields in quiescent prominences

Details Magnetic fields in quiescent prominences Magnetic fields in quiescent prominences

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...361..283v&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 361, Sept. 20, 1990, p. 283-289.

Astronomy and Astrophysics

Astrophysics

77

Magnetohydrodynamics, Solar Corona, Solar Magnetic Field, Solar Prominences, Astronomical Models, Photosphere, Solar Flux, Solar Rotation

Scientific paper

The 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.

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