TRACE and RHESSI observations of white-light flares

Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

7507 Chromosphere, 7519 Flares, 7554 X Rays, Gamma Rays, And Neutrinos

Scientific paper

TRACE gives a photometrically stable, high-resolution view of the visible and UV emissions of solar flares, with enough diagnostic power to distinguish photospheric from chromospheric contributions. These emissions dominate the radiant energy of a flare and correspond well with hard X-ray emission in the impulsive phase. We survey these data with reference to well-observed events of 4~October~2002 and 4~November~2003, on the disk (M4; S19W09) and on the limb (X17; S19W83) respectively. We analyze the spatial and temporal properties of the footpoint sources in these two events, characterizing their physical parameters (contrast, image gradients, apparent motions). The brightest kernels of the 4~October~2002 event have intensities twice that of the quiet photosphere, and have sizes close to the Nyquist limit of the TRACE pixels (0.5~arc~sec). The white-light footpoint sources can be considered as a proxy for the target region of fast electrons studied via hard X-ray bremsstrahlung. We compare RHESSI hard X-ray footpoint sources with their white-light counterparts and estimate filling factors for the hard X-ray emission itself.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

TRACE and RHESSI observations of white-light 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 TRACE and RHESSI observations of white-light flares, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and TRACE and RHESSI observations of white-light flares will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1700376

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.