Polarimetric Properties of Flux-Ropes and Sheared Arcades in Coronal Prominence Cavities

The coronal magnetic field is the primary driver of solar dynamic events. Linear and circular polarization signals of certain infrared coronal emission lines contain information about the magnetic field, and to access this information, either a forward or an inversion method must be used. We study t...

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Bibliographic Details
Published in:arXiv.org 2013-04
Main Authors: Rachmeler, L A, Gibson, S E, Dove, J B, DeVore, C R, Fan, Y
Format: Article
Language:English
Subjects:
Circular polarization
Filaments
Holes
Magnetic fields
Magnetic flux
Morphology
Polarimetry
Solar corona
Solar magnetic field
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Summary:The coronal magnetic field is the primary driver of solar dynamic events. Linear and circular polarization signals of certain infrared coronal emission lines contain information about the magnetic field, and to access this information, either a forward or an inversion method must be used. We study three coronal magnetic configurations that are applicable to polar-crown filament cavities by doing forward calculations to produce synthetic polarization data. We analyze these forward data to determine the distinguishing characteristics of each model. We conclude that it is possible to distinguish between cylindrical flux ropes, spheromak flux ropes, and sheared arcades using coronal polarization measurements. If one of these models is found to be consistent with observational measurements, it will mean positive identification of the magnetic morphology that surrounds certain quiescent filaments, which will lead to a greater understanding of how they form and why they erupt.
ISSN:2331-8422
DOI:10.48550/arxiv.1304.7594