An Unusal Filament Cavity as Seen from 3D Tomographic Analysis of STEREO-EUVI and Hinode-XRT.

FRAZIN, RICHARD A.; VÁSQUEZ, ALBERTO M.; REEVES, K.

Dorset, England

Workshop; STEREO-3/SOHO-22 Workshop; 2009

Tomographic multi-wavelength three-dimensional (3D) reconstructions of the global solar corona are presented. The reconstructions are based on a 23.5 day time series of multi-band data from the Extreme UltraViolet Imager (EUVI) on NASA’s twin- spacecraft Solar TErrestrial RElations Observatory (STEREO) mission. From these reconstructions, the global 3D density and temperature distributions are determined. This detailed empirical information provides an extensive set of constraints on models of the heating of the GSC. Specifically, coronal cavities are analyzed. Cavities overlie chromospheric filaments, which are the source of 2/3 of all coronal mass ejections. Thus, the results reported here have a direct bearing on the initial state of eruptive filaments before the onset of instability. We have recently published average cavities properties derived from our analysis. In this work we study in detail the most prominent cavity of the analyzed period, which exhibits unusually broad DEM distributions.