The hard X-ray spectral structure of flare ribbons

Details The hard X-ray spectral structure of flare ribbons The hard X-ray spectral structure of flare ribbons

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.5403f&link_type=abstract

American Astronomical Society Meeting 204, #54.03; Bulletin of the American Astronomical Society, Vol. 36, p.758

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We examine the spatial distribution of hard X-ray spectral parameters in flares exhibiting the classic two-ribbon structure using RHESSI observations. The flares studied include July 15 and July 17, 2002, and October 29, 2003. We confirm the existence of a tendency for the localization of the hard X-ray sources into dominant bright ``footpoint'' regions which do not show ribbon structure as extensive as that seen in Hα or UV images. As a part of the study we characterize the ribbons photometrically in the EUV as observed by TRACE, confirming earlier results that find complicated relationships between EUV and hard X-rays. We seek an empirical explanation for the restricted hard X-ray footpoints in terms of a spatial analog of the well-known ``soft-hard-soft'' morphology: the regions of weaker hard X-ray emission correspond to steeper X-ray energy spectra and hence to softer electron precipitation spectra. This relationship may be as predicted by the 1D radiation hydrodynamics models of flaring loops.

Affiliated with

Also associated with

No associations

Rating

The hard X-ray spectral structure of flare ribbons 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 The hard X-ray spectral structure of flare ribbons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The hard X-ray spectral structure of flare ribbons will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1174104