X-ray analysis of a polar plume |
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| Authors: | Imad A Ahmad David F Webb |
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| Institution: | (1) American Science and Engineering, Inc., 02139 Cambridge, Mass., U.S.A.;(2) Present address: Astronomy Program, University of Maryland, 20742 College Park, Md., U.S.A. |
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| Abstract: | Polar plumes have been detected in X-rays with the Skylab S-054 experiment. Observations of one well observed plume are analyzed and the plasma pressure is determined. An isothermal model in hydrostatic equilibrium is found to require unacceptably low temperatures. A hydrodynamic model is proposed which is consistent with earlier white light and EUV observations. Calculations indicate that the total outward mass flux in polar plumes is comparable to that in high speed solar wind streams expected from a polar coronal hole. |
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