Red Asymmetries of Optical Lines at the Impulsive Phase of Solar Flares
Impulsive phase spectra of two chromospheric flares were obtained with high temporal resolution. H_alpha, Ca II K, He I D_3, and other metallic lines were observed simultaneously and their red asymmetries were studied. Velocities derived from K and D_3 line emissions are found to be as large as H_alpha velocity, contrary to the previous works.
Proceedings of Kofu Symposium
- Pub Date:
- July 1994