Combined study between the chromospheric flare models and hard X-ray observation

✍ Scribed by Gan Wei-Qun; Fang Cheng

• Publisher: Springer
• Year: 1990
• Tongue: English
• Weight: 508 KB
• Volume: 125
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00158410

✦ Synopsis

By comparison between SMM HXRBS observation and ground observation of He and Can K lines for the 2B flare on February 3, 1983, we found that there was a temporal correlation between He intensity and hard X-ray flux at the early stage of the impulsive phase while different peaks in the hard X-ray flux curve represented bursts at different locations. When we combined SMM HXRBS observation with chromospheric flare models, we further found that the temporal coincidence between He intensity and hard X-ray flux could be explained quantitatively by the fact that the He flare was indeed due to the heating by non-thermal electron beams responsible for the emission of hard X-rays. Together with the discussion on coronal density based on chromospheric flare models, it was also shown that the source of electrons seemed to be situated around the top of the flare loop and the column density at the top of the chromosphere in semi-empirical flare models could not be taken as the total material above the top of the chromosphere.