SPRG Seminars

November 4, 2008:

"Instant Tomography of Active Regions and Flare Modeling with STEREO"

Markus J. Aschwanden, Lockheed Martin, Solar & Astrophysics Lab

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The first stereoscopic 3D reconstructions of coronal loops and active regions with the STEREO/EUVI A and B spacecraft are presented. First we discuss the stereoscopic triangulation of the 3D geometry, then the measurements of electron density and temperatures, and then we develop the new ISTAR (Instant Tomography of Active Regions) method, which combines stereoscopic with tomographic elements to obtain a full 3D rendering of an active region.  

This new method achieves a 3D view and is about 4 orders of magnitude faster than standard tomographic methods using the solar rotation. - In addition, we give also some other examples of recent studies with STEREO/EUVI, such as the hydrodynamic evolution of flares, EUV dimming during CME launches, and the excitation of coronal loop oscillations.