Energy Release Rates along Hα Flare Ribbons and the Location of Hard X-Ray Sources

Details Energy Release Rates along Hα Flare Ribbons and the Location of Hard X-Ray Sources Energy Release Rates along Hα Flare Ribbons and the Location of Hard X-Ray Sources

Jan 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007apj...654..665t&link_type=abstract

The Astrophysical Journal, Volume 654, Issue 1, pp. 665-674.

Astronomy and Astrophysics

Astronomy

29

Sun: Flares, Sun: Magnetic Fields, Sun: X-Rays, Gamma Rays

Scientific paper

Local reconnection and energy release rates for an X3.8 flare that occurred on 2005 January 17 are derived. In particular, we distinguish between Hα flare ribbon segments that were accompanied by RHESSI hard X-ray (HXR) footpoints and those without HXRs. We find that the reconnection and energy release rates are not uniform along the flare ribbons but much larger at the locations where the HXR footpoints are observed. The difference is about 2 orders of magnitude in the case of the energy release rates and 1 order of magnitude for the reconnection rates (with peak values up to 8 kV m-1). These differences are enough to explain the different flare morphologies typically observed in HXRs (compact footpoints) and Hα/UV (extended ribbons) by the limited dynamic range of present HXR instruments. Our results are consistent with a scenario in which the electrons are accelerated primarily along a certain subsystem of magnetic loops as outlined by the HXR footpoints, and only a minor fraction (for the 2005 January 17 flare estimated to be about 1/15) go into the large flare arcade outlined by the Hα ribbons and EUV postflare loops.

Affiliated with

Also associated with

No associations

Rating

Energy Release Rates along Hα Flare Ribbons and the Location of Hard X-Ray Sources 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 Energy Release Rates along Hα Flare Ribbons and the Location of Hard X-Ray Sources, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Energy Release Rates along Hα Flare Ribbons and the Location of Hard X-Ray Sources will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1364004