Transversal and Radial Motions of Flaring Kernels for 11 August 2992 Event

Details Transversal and Radial Motions of Flaring Kernels for 11 August 2992 Event Transversal and Radial Motions of Flaring Kernels for 11 August 2992 Event

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.446..639s&link_type=abstract

8th SOHO Workshop: Plasma Dynamics and Diagnostics in the Solar Transition Region and Corona. Proceedings of the Conference hel

Astronomy and Astrophysics

Astrophysics

Scientific paper

We have studied time variations of the maximum brightness location for pronounced flare emission kernels as seen on deconvolved Yohkoh Soft X-ray Telescope images. Spatial resolution achieved on the deconvolved images was +- 0.5 arcsec. Derived patterns of spatial displacements observed on Al01, Al12 and Be119 filter images have been intercompared. This comparison revealed systematic pattern of variations for kernels located within the footpoint and summit flare regions. We have found that the time variations of maximum brightness location are typical for all flare kernels investigated. We have related this transversal position changes with soft X-ray line displacements as determined from Yohkoh Bent Crystal Spectrometer for SXV, Ca XIX and Fe XXV ion spectra (radial velocity component). We have noticed definite time correspondence between transversal motions of kernels, spectral line displacements and the details of flare hard X-ray flux variability. This correspondence is especially well pronounced during the initial phase for many disc and limb events. We discuss the importance of the noticed pattern on possible flare scenarios.

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