Physical conditions in the chromosphere of a two-ribbon solar flare accompanied by a surge: II

摘要: Based on spectral observations using an ATsU-26 horizontal solar telescope (Elbrus Region, Terskol Peak Observatory, 3100 m), the modeling of a two-ribbon chromospheric flare accompanied by surge September 4, 1990, is carried out. Semiempirical models were calculated for three moments initial phase at stage gradually growing soft X-ray radiation. Variations plasma physical parameters in different parts (at center and edge) emission kernels onto which projected are studied. The was out with help two- or three-component matching observed line profiles. Additional components filling factors from 2 to 15% necessary explaination significant wings Hα line. calculations have shown that temperature lower layers 1000–3500 K higher than quiet Sun (VAL-C model). line-of-sight velocities determined explain features asymmetry In most models, substance upper chromosphere moves towards observer. chromosphere, varied −100 −15 km/s, while they do not exceed −40 km/s chromosphere. some periods time, velocity central part middle reached value 15 demonstrate presence oppositely directed flows ranging (to observer) 160 (from observer).