The characteristic analysis of an active region producing a number of CME's

Details The characteristic analysis of an active region producing a number of CME's The characteristic analysis of an active region producing a number of CME's

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001acasn..42..357x&link_type=abstract

Acta Astronomica Sinica, vol.42, no.4, p. 357-363

Astronomy and Astrophysics

Astrophysics

2

Solar Radio, Cme, Sxr, Solar Radio

Scientific paper

There are 6 successive major burst events in the AR 8210 on the solar disk during April and May, 1998.The data are collected for this active region including the observation on soft X ray, UV, type II and IV radio bursts and radio-heliograph. It is found the energy accumulation process is fast and there is similarity among the time profile of the 3 SXR bursts. When CMEs are there on the disk, the magnetic loop opens only partially and soon contracts into closed. The loop is then reheated through bombarding by non-thermal electrons and produces strong X ray bursts, radio types II and IV bursts. The frail part of the loop just like a volcanic crater from where bursts could be taking place again and again. The turning point between a non-thermal process and a thermal process may be found from investigating the time profiles of SXR on which it displays as an catastrophe point of the slope.
Furthermore the existence of type III bursts could be a corresponding signature. The appearance of type II radio bursts coming from the different coronal layers can be a convincing evidence for the occurring of CMEs and a criterion for judging the speed of CMEs' motion.

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