Temperature and Electron Density Along Elementary Coronal Loop Strands as Observed by TRACE

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Using the measured data of our initial triple-filter study originally observed by TRACE (with its < 1" resolution) in all three extreme-ultraviolet (EUV) filters at 171, 195, and 284 A (Aschwanden and Nightingale, 2005), where we disentangled the multi-thread structure of 78 coronal loops into elementary threads with isothermal cross-sections, we analyze now the 1-dimensional functions of temperature T(s), electron density n(s), and loop width w(s) along these finest observed loop threads. These functions of physical parameters determined with triple-filter data and subarcsecond resolution are believed to be the least background-contaminated measurements of coronal loop structures available today and thus provide suitable input for hydrodynamic loop models in the temperature range of T=0.7-2.7 MK. This work was supported in part by NASA under the TRACE contract NAS5-38099.

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