TY  - JOUR
A1  - Thompson, W. T.
A1  - Kliem, Bernhard
A1  - Toeroek, Tibor
T1  - 3D reconstruction of a rotating erupting prominence
T2  - Solar physics : a journal for solar and solar-stellar research and the study of solar terrestrial physics
N2  - A bright prominence associated with a coronal mass ejection (CME) was seen erupting from the Sun on 9 April 2008. This prominence was tracked by both the Solar Terrestrial Relations Observatory (STEREO) EUVI and COR1 telescopes, and was seen to rotate about the line of sight as it erupted; therefore, the event has been nicknamed the "Cartwheel CME." The threads of the prominence in the core of the CME quite clearly indicate the structure of a weakly to moderately twisted flux rope throughout the field of view, up to heliocentric heights of 4 solar radii. Although the STEREO separation was 48A degrees, it was possible to match some sharp features in the later part of the eruption as seen in the 304 line in EUVI and in the H alpha-sensitive bandpass of COR1 by both STEREO Ahead and Behind. These features could then be traced out in three-dimensional space, and reprojected into a view in which the eruption is directed toward the observer. The reconstructed view shows that the alignment of the prominence to the vertical axis rotates as it rises up to a leading-edge height of a parts per thousand aEuro parts per thousand 2.5 solar radii, and then remains approximately constant. The alignment at 2.5 solar radii differs by about 115A degrees from the original filament orientation inferred from H alpha and EUV data, and the height profile of the rotation, obtained here for the first time, shows that two thirds of the total rotation are reached within a parts per thousand aEuro parts per thousand 0.5 solar radii above the photosphere. These features are well reproduced by numerical simulations of an unstable moderately twisted flux rope embedded in external flux with a relatively strong shear field component.
KW  - Corona, active
KW  - Prominences, active
KW  - Coronal mass ejections
KW  - Initiation and propagation
KW  - Magnetic fields, corona
Y1  - 2012
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/36172
SN  - 0038-0938
VL  - 276
IS  - 1-2
SP  - 241
EP  - 259
PB  - Springer
CY  - Dordrecht
ER  -