The structure of a prominence sheet |
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Authors: | Cartledge N P Titov V S |
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Institution: | (1) Department of Mathematical and Computational Sciences, University of St. Andrews, KY16 9SS, U.K.;(2) Program Systems Institute of the Russian Academy of Sciences, 152140 Pereslavl-Zalessky, Russia |
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Abstract: | A one-dimensional analysis of Kippenhahn-Schlüter type is applied to a sheet of prominence material inclined at an angle, to the horizontal. It is found that the magnetic pressure across the prominence no longer has a symmetric profile, but is stronger on the lower side of the sheet. This excess in magnetic pressure is necessary to balance the component of prominence weight in that direction. A matching function is derived and allows for variations along the length of the sheet, enabling the internal prominence solution to be linked onto a given background potential field. In this way a curved prominence sheet in a potential field may be resolved. A smooth profile for the magnetic field and a continuous variation of plasma pressure across the prominence region is then possible. An example is given in which the analysis is applied to a polar-crown prominence configuration of inverse polarity and the basic properties of the prominence are determined. |
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