Determination of Electron Density and Filling Factor for Soft X-Ray Flare Kernels

• DOI: 10.1007/s11207-011-9812-8
• Publication Date: 2011-07-05T12:00:53Z
• Authors: J. Jakimiec; U. Ba̧k-Stȩślicka
• Keywords: Flare; Line-of-sight; Line (geometry); Solar flare; Kernel (algebra); Filling factor; Kernel density estimation

In a standard method of determining electron density for soft X-ray (SXR) flare kernels it is necessary to assume what the extension kernel along line sight. This source significant uncertainty obtained densities. our previous paper (Bak-Steslicka and Jakimiec, 2005) we have worked out another deriving density, in which not The point that many flares, during their decay phase, evolve sequence steady-state models [quasi-steady-state (QSS) evolution] then scaling law, derived models, can be used determine density. aim present is: (1) improve two methods determination, (2) compare densities with methods. We selected number flares showed QSS evolution phase. For these N, has been by means method. Comparison N values different allowed us: test densities, evaluate volume filling factor SXR emitting plasma. Generally, found good agreement (no large systematic difference) between methods, but some cases differ up 2. most estimated turned about 1, near maximum.