A scenario of the X4.8 flare of 2002 July 23 based on RHESSI and TRACE observations

Details A scenario of the X4.8 flare of 2002 July 23 based on RHESSI and TRACE observations A scenario of the X4.8 flare of 2002 July 23 based on RHESSI and TRACE observations

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005cha%26a..29...61l&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 29, Issue 1, p. 61-70.

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

From an inter-comparison among TRACE, RHESSI, and Hα images of the X4.8 flare of 2002 July 23, we found it to be a typical two-ribbon flare. The Hα and TRACE 195Å images are all shown to have the two-ribbon pattern, while the TRACE 195Å images show also a loop-arch whose footpoints deviate slightly from the ribbons. The TRACE 195Å ribbons match well the higher energy hard X-ray images. During the impulsive phase, the hard X-ray images above 38 keV present a low-lying loop connecting the two ribbons of TRACE 195Å. Above the low-lying loop, there is a coronal low energy hard X-ray source. The spatial structure and evolutionary patterns as a whole are presented. Possible theoretical explanations are briefly discussed.

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