H-ALPHA PROFILES FROM ELECTRON-HEATED SOLAR-FLARES

被引:50
作者
BROWN, JC [1 ]
CANFIELD, RC [1 ]
ROBERTSON, MN [1 ]
机构
[1] UNIV CALIF SAN DIEGO,DEPT PHYS,LA JOLLA,CA 92093
关键词
D O I
10.1007/BF00160112
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We briefly review the status of models of optical flare heating by electron bombardment. We recompute Brown's (1973a) flare model atmospheres using considerably revised radiative loss rates, based on Canfield's (1974b) method applied to α, Lα, and H-. Profiles of α are computed and compared with observation. The computed profiles agree satisfactorily with those observed during the large 1972 August 7 flare, if spatial and velocity inhomogeneities are assumed. The electron injection rate inferred from α is one order of magnitude less than that inferred from hard X-rays, for this event. This may be due to either (1) the neglect of a mechanism that reduces the thick-target electron injection rate or (2) failure to incorporate important radiative loss terms. © 1978 D. Reidel Publishing Company.
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页码:399 / 408
页数:10
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