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Hard X-ray Intensity Distribution Along Hα Ribbons View all abstracts by submitter

Jeongwoo Lee   Submitted: 2007-06-27 09:54

Unusual ribbon-like hard X-ray sources were found with the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) observation of the 2B/M8.0 flare on 2005 May 13. We use this unique observation to investigate the spatial distribution of the hard X-ray intensity along the ribbons and compare it with the local magnetic energy release rate predicted by the standard magnetic reconnection model for two ribbon flares. In the early phase of the flare, the hard X-ray sources appear to be concentrated in strong field sections within the Hα ribbons, which is explicable by the model. On and after the flare maximum phase, the hard X-ray sources become spatially extended to resemble Hα ribbons in morphology, during which the spatial distribution of hard X-ray intensity lacks a correlation with that of the local magnetic energy release rate predicted by the model. We discuss the latter result as a limitation of the standard 2D model in application to a realistic 3D reconnection. More specifically we argue that the magnetic reconnection during this event may involve the magnetic field rearrangement along the magnetic arcade axis which is inevitably overlooked by the 2D model.

Authors: Ju Jing, Jeongwoo Lee, Chang Liu, Dale E. Gary, and Haimin Wang
Projects: RHESSI

Publication Status: ApJL (in press)
Last Modified: 2007-06-27 10:48
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