Observation Features Research Of Magnetic Reconnection Current Sheet Associated With Solar Eruption Events

In the paper, we give a brief instruction to the solar structure and main activity phenomenon at ?rst, and then describe observation and research significance of coronal mass ejection, as well as magnetic reconnection current sheet observation and theoretical research. Afterwards, we give a detail description about our work. At last, it is a summary and an indication of the direction for our further work.After coronal mass ejection(CME), off-limb observations of solar coronal indicate existing strong UV source existing at solar coronal region. In this region,it happened reconstruct of antiparallel magnetic ?led lines caused by local diffusion and energy release process(i.e. magnetic reconnection). The region stretched by eruption is so-called reconnection current sheet. In the CME event eruption process, CS not only be the important region where magnetic free energy quickly convert into thermal, kinetic energy and high energy particle beam, but also be the ”bridge” of connecting CME and ?are. We analyze the CME events happened in 2003 January 3 and November 4. After coronal mass ejection leaving solar surface, both event observed the formation of CS. We combine the data from the Large Angle and Spectrometric Coronagraph Experiment, Ultraviolet Coronagraph Spectrometer on board the Solar and Heliospheric Observatory, as well as from the Big Bear Solar Observatory and Yunnan Observatories Hα images, to investigate the dynamical properties of these two events, and physical properties of the current sheets. The existence of highly ionized particles, suchasFe+17, Si+11, indicate in the current sheet the temperature reached up to(3～ 5)× 106 K. The width of CSs in two events is about 1.3 × 104 km ～ 1.1 ×105km, decreasing with time. Using CHIANTI(ver 7.1), we can further calculate the electron temperature and emission measure of the CS in the 2003 January 3event, and obtain the mean value of 3.84 × 106 K and 6.1 × 1024cm-5respectively. For the 2003 November 4 event, we calculate the velocity difference between current sheet two sides, ?nding that wings of the CS show quasi-periodic twist motion.