Statistics – Computation
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987soph..110..295e&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 110, no. 2, 1987, p. 295-303.
Statistics
Computation
41
Electron Beams, Impulses, Line Shape, Plasma Heating, Solar Flares, X Ray Spectra, Calcium, Computational Astrophysics, Plasma-Particle Interactions
Scientific paper
Using a model of the hydrodynamic response of a flare loop to energy input in the form of a nonthermal electron beam, the predicted line profile of the Ca XIX resonance line at 3.177 A is computed. The results are compared with observations and are shown to generally agree, both qualitatively and quantitatively, with these observations. The model does, however, predict an overall blueshift in the line profile, a result which differs with earlier interpretations of the observations, and which remains to be tested by absolutely calibrated measurements of the Ca XIX spectrum. It is concluded that electron-heated models of solar flares quite naturally predict the observed features in the Ca XIX line profile, without the need to introduce nonthermal motions or an artificial division of the flare plasma into two distinct components, as suggested by previous authors.
Alexander David
Emslie Gordon A.
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