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3D Reconstruction of a Rotating Erupting Prominence View all abstracts by submitter

Bernhard Kliem   Submitted: 2011-12-16 08:00

A bright prominence associated with a coronal mass ejection (CME) was seenerupting from the Sun on 9 April 2008. This prominence was tracked by both theSolar Terrestrial Relations Observatory (STEREO) EUVI and COR1 telescopes, andwas seen to rotate about the line of sight as it erupted; therefore, the eventhas been nicknamed the 'Cartwheel CME'. The threads of the prominence in thecore of the CME quite clearly indicate the structure of a weakly to moderatelytwisted flux rope throughout the field of view, up to heliocentric heights of 4solar radii. Although the STEREO separation was 48 degrees, it was possible tomatch some sharp features in the later part of the eruption as seen in the 304{AA} line in EUVI and in the Hα -sensitive bandpass of COR1 by both STEREOAhead and Behind. These features could then be traced out in three-dimensionalspace, and reprojected into a view in which the eruption is directed towardsthe observer. The reconstructed view shows that the alignment of the prominenceto the vertical axis rotates as it rises up to a leading-edge height of approx2.5 solar radii, and then remains approximately constant. The alignment at 2.5solar radii differs by about 115 degrees from the original filament orientationinferred from Hα and EUV data, and the height profile of the rotation,obtained here for the first time, shows that two thirds of the total rotationis reached within approx 0.5 solar radii above the photosphere. These featuresare well reproduced by numerical simulations of an unstable moderately twistedflux rope embedded in external flux with a relatively strong shear fieldcomponent.

Authors: W. T. Thompson, B. Kliem, T. Toeroek
Projects: STEREO

Publication Status: published in Solar Physics (Online First)
Last Modified: 2011-12-19 09:10
Go to main E-Print page  A Parametric Study of Erupting Flux Rope Rotation. Modeling the ''Cartwheel CME'' on 9 April 2008  Using SDO's AIA to investigate energy transport from a flare's energy release site to the chromosphere  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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