Spectral Hardening of Large Solar Flares

Details Spectral Hardening of Large Solar Flares Spectral Hardening of Large Solar Flares

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh53a1062g&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SH53A-1062

Physics

7509 Corona, 7519 Flares, 7554 X-Rays, Gamma Rays, And Neutrinos

Scientific paper

We present quantitative studies of the hard X-ray spectral evolution of large solar flares featuring hardening trends, using RHESSI high cadence spectroscopy observations. The temporal evolution of the spectra is compared with the configuration and motion of the hard X-ray sources in RHESSI images. Both soft-hard-soft (impulsive) phases and hardening (gradual) phases are observed during the events and are well described by piecewise linear dependence of the spectral index on the logarithm of the flux. In particular, we investigate whether two different acceleration mechanisms are responsible for the impulsive and gradual phases, finding evidence that points toward a single acceleration mechanism acting in the two phases, rather than two different separated mechanisms, because the impulsive and gradual phases are closely interconnected in time and space.

Affiliated with

Also associated with

No associations

Rating

Spectral Hardening of 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 Spectral Hardening of Large Solar Flares, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectral Hardening of Large Solar Flares will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1419650