HR: 0830h
AN: SH11D-1130    [PDF]
TI: The X-ray source region of $^3$He-rich solar energetic particle events
AU: * Krucker, S
EM: krucker@ssl.berkeley.edu
AF: Space Sciences Lab, Universtity of California Centennial Drive at Grizzly Peak, Berkeley, CA 94720-7450 United States
AU: Lin, R P
AF: Space Sciences Lab, Universtity of California Centennial Drive at Grizzly Peak, Berkeley, CA 94720-7450 United States
AU: Lin, R P
AF: Physics Department, Universtiy of California, Berkeley, CA 94720-7300 United States
AU: Kontar, E P
AF: University of Glasgow, Kelvin Building, Glasgow, G128QQ United Kingdom
AU: Mason, G M
AF: University of Maryland, Dept. of Physics, College Park, MD 20742 United States
AU: Wiedenbeck, M E
AF: JPL, MS 169-327, Pasadena, CA 91109 United States
AB: The Reuven Ramaty High Energy Spectroscopic Imager RHESSI allows for the first time to study simultaneously the spatial and spectral characteristics of solar hard X-ray emission in detail. In this paper, RHESSI X-ray imaging spectroscopy is used to investigate the source regions of $^3$He-rich solar energetic particles observed at 1 AU. A series of very large $^3$He-rich events that occurred between August 19-21, 2002 are investigated. The timing of the simultaneously observed electron events suggests that these particle events are related to a series of GOES M class flares. All events originated from the same active region AR0069 and show a similar behavior: Next to the main flaring loops, TRACE observations additionally show an EUV jet that appears to escape from the Sun with a speed of up to 500 km s$^{-1}$. X-ray emission is seen from the main flaring loops as well; however, the most prominent source in $>$30 keV hard X-rays appears to be displaced from the flaring loops, at the footpoint of the field lines along which the jet is moving outward. We investigate the possibility that the HXR footpoint is produced by the downward moving part of the same electron population that escapes to 1 AU, by comparing the derived electron spectrum from the HXR footpoint source with the in situ observed electron spectrum.
UR: http://sprg.ssl.berkeley.edu/~krucker/hessi/ace/movie/
DE: 2118 Energetic particles, solar
DE: 7509 Corona
DE: 7519 Flares
DE: 7554 X rays, gamma rays, and neutrinos
DE: 7807 Charged particle motion and acceleration
SC: SPA - Solar and Heliospheric Physics [SH]
MN: 2003 Fall Meeting