Soft X-ray, Ca XIX, and H-alpha observations obtained for a set of four solar flares in the impulsive phase are analyzed. A blue asymmetry was observed in the coronal Ca XIX line during the soft-Xray rise phase in all of the events. A red asymmetry was observed simultaneously in chromospheric H-alpha at spatial locations associated with enhanced flare heating. It is shown that the impulsive phase momentum of upflowing soft X-ray plasma equalled that of the downflowing H-alpha plasma to within an order of magnitude. This supports the explosive chromospheric evaporation model of solar flares.
Coordinated soft X-ray and H-alpha observation of solar flares
Advances in Space Research ; 8 , 11 1
1988-01-01
Miscellaneous
No indication
English
Coordinated soft X-ray and Hα observations of solar flares
Elsevier | 1989
|NTIS | 2017
|NTRS | 2017
|NTRS | 2017
|NTIS | 2015
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