Physics
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987soph..110..359a&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 110, no. 2, 1987, p. 359-379.
Physics
1
Electron Scattering, H Alpha Line, Radial Distribution, Solar Prominences, Stellar Mass Ejection, Solar Limb, Time Dependence
Scientific paper
Gradients of H-alpha and electron scattering intensities derived from instantaneous radial distributions of erupting prominence material observed at several solar radii by Illing and Athay (1986) are often markedly smaller than those inferred by comparing the intensities observed near several radii to average prominence intensities observed near the limb. In this paper, it is shown that gradients derived by following individual features in their outward progression with time yield values that are consistent with limb observations and that usually exceed the values obtained from instantaneous distributions. It is concluded from the diversity of observed gradients that the prominence eruption cannot be described by a self-similar expansion in which the expansion velocity is a function of radius and time only. However, possible self-similar solutions that allow the expansion velocity to be a function of angular direction cannot be ruled out.
Athay Grant R.
Chye Low Boon
Rompolt Bogdan
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