34th Solar Physics Division Meeting, June 2003
Session 18 RHESSI Results II
Poster, Wednesday, June 18, 2003, 3:30-5:00pm, Mezzanine

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[18.02] A Statistical Study of Limb Flares Observed by RHESSI: Imaging

W. Liu, Y. W. Jiang, V. Petrosian (Department of Physics, Stanford University, Stanford, CA 94305-4060), T. R. Metcalf (LMSAL, Lockheed Martin Solar and Astrophysics Laboratory, Palo Alto, CA 94304)

Hard X-ray observations by the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) provide unprecedented opportunities to understand the underlying physics driving solar flares. We have embarked on an investigation of a sample of {\bf\it limb flares} observed by RHESSI. RHESSI flare images, combined with TRACE EUV observations and SoHO/MDI magnetograms, are used to infer flaring loop structures and to distinguish between footpoint, loop top and other possible types of sources. We will present an analysis of the lightcurves and images for these features and will show statistics on the occurrence of loop top and footpoint sources. These will be compared with previous studies utilizing YOHKOH/HXT observations, and the implications for particle acceleration processes and other theoretical aspects of flares will be discussed.

The work at Stanford is supported by NASA grants NAG5-12111, NAG5 11918-1, and SUB2001-402-01 through the University of Alabama in Huntsville (PI: J. Miller). T. Metcalf would like to acknowledge support from grant NAS-98033-05/03.

The author(s) of this abstract have provided an email address for comments about the abstract: weiliu@ahoor.stanford.edu

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