Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsh21d..04m&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SH21D-04
Physics
7513 Coronal Mass Ejections, 7811 Discontinuities, 7839 Nonlinear Phenomena, 7843 Numerical Simulation Studies, 7851 Shock Waves
Scientific paper
We present synthetic Thomson-scattered white-light images of a simulated coronal mass ejection (CME). The simulations are based on a 3-D MHD model of a CME propagating through a bimodal solar wind characteristic of solar minimum. The CME is driven by a 3-D Gibson-Low flux rope inserted in the helmet streamer of the steady-state corona. Synthetic coronograph images are produced that follow the evolution of the CME to 1 AU from several points of view. The white light images provide a basis for comparison with wide angle coronographs, like those of SMEI or STEREO. We find that a large amount of plasma is swept up from the solar wind by the CME-driven shock wave, which dominates the density structure far from the Sun. We also find that the shape of this compressed plasma is highly distorted by the variation in speed of the ambient solar wind. Comparisons of 2-D integrated images to the 3-D density structure show that the viewing angle severely effects the line-of-sight appearance of the CME, as well as the estimated mass of the CME from such 2D images.
de Zeeuw D.
Gombosi Tamas
Lugaz Noé
Manchester Ward B.
Sokolov Iu. I.
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