EUV analysis of polar plumes

Details EUV analysis of polar plumes EUV analysis of polar plumes

Aug 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977soph...53..397a&link_type=abstract

Solar Physics, vol. 53, Aug. 1977, p. 397-408.

Physics

50

Far Ultraviolet Radiation, Magnetic Poles, Solar Corona, Solar Magnetic Field, Solar Prominences, Electron Density Profiles, Emission Spectra, Plasma Temperature, Plumes, Solar Wind, Spectroheliographs

Scientific paper

Three polar plumes were studied using Skylab Mg X and O VI data. The plumes lie within the boundaries of a polar coronal hole. We find that the mean temperature of the plumes is about 1.1 million K and that they have a small vertical temperature gradient. Densities are determined and found consistent with white light analyses. The variation of density with height in the plumes is compared with that expected for hydrostatic equilibrium. As is the case for other coronal features, polar plumes will be a source of solar wind if the magnetic field lines are open. On the basis of the derived plume model and estimates of the numbers of plumes in polar coronal holes, it appears that polar plumes contain about 15% of the mass in a typical polar hole and occupy about 10% of the volume.

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