Physics
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....9110961a&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Oct. 1, 1986, p. 10961-10973.
Physics
16
Coronagraphs, H Alpha Line, Solar Corona, Solar Prominences, Stellar Mass Ejection, Electron Scattering, Hydrogen Ions, Polarimeters, Solar Maximum Mission
Scientific paper
Coronal mass ejections detected with the Solar Maximum Mission coronagraph/polarimeter are often accompanied by erupting prominence material observed both in Hα and in the electron scattering continuum. The authors develop a diagnostic method based on the observed Hα and continuum brightness to derive the electron density, line of sight thickness, and degree of ionization of hydrogen as functions of the temperature of the prominence filaments. Analysis of data from the event of August 18, 1980, illustrates that the rising prominence material has decreased density, increased temperature, and increased ionization of hydrogen relative to quiescent prominences in the lower corona. Hydrogen is found to be 90 - 99% ionized, electron densities are near 108cm-3, and the temperature is near 20,000K. The increased ionization is due mainly to the decreased density. Use of the results is made to determine the total mass ejected in the event.
Athay Grant R.
Illing Rainer M. E.
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