Physics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsp51c..10c&link_type=abstract
American Geophysical Union, Spring Meeting 2008, abstract #SP51C-10
Physics
7519 Flares, 7526 Magnetic Reconnection (2723, 7835), 7549 Ultraviolet Emissions, 7554 X-Rays, Gamma Rays, And Neutrinos
Scientific paper
Ultraviolet and hard X-ray (HXR) emissions in solar flares provide signatures of flare-accelerated particles with the chromosphere. Initial studies of flare emission at these wavelengths have indicated a strong co-temporal relationship during the impulsive phase of solar flares, suggesting they arise from a common origin, often attributed to the accelerated particle production via coronal magnetic reconnection. While spatially-unresolved studies have shown a strong temporal correlation, recent spatially-resolved observations indicate that co- temporal UV and HXR emission can originate from distinct locations, raising the question as to how the global magnetic topology and energy release mechanisms relate to the spatial and temporal development of the localized UV and HXR emission. The spatial resolution provided by TRACE and RHESSI imaging presents an opportunity to address these global relationships on the level of individually distinguishable sources. We present an analysis and comparison of spatially-resolved hard X-ray and localized UV emission sources for a number of M and X class flares with observations from RHESSI and high-cadence 1600 Å observations from TRACE. Within each flare we investigate the overall temporal development of individual UV sources and relate them to individual impulsive hard X-ray bursts. We find that for these large flares, the bulk of the temporally correlated UV and HXR emission evolves in a series of localized co-spatial sources along the UV ribbons consistent with previous 2-D reconnection pictures, however, extended UV ribbon emission, the evolution of multiple burst events, and the existence of UV sources developing late in the flare evolution indicate the need for a 3-D magnetic topology scenario along with the suggestion that multiple physical mechanisms appear necessary to reproduce the emission in these flares.
Alexander Dave
Coyner Aaron J.
No associations
LandOfFree
Temporal Development of Localized UV and Hard X-ray Emissions in Large Solar Flares does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Temporal Development of Localized UV and Hard X-ray Emissions in Large Solar Flares, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temporal Development of Localized UV and Hard X-ray Emissions in Large Solar Flares will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1403722