Properties and Modeling of a CME-driven Shock out of the Plane of the sky Through UVCS/SoHO Observations
Abstract
The UltraViolet Coronagraph Spectrometer (UVCS/SoHO) telescope operating on board SoHO observed the passage of a CME on June 27, 1999. The ~900 km.s-1 CME was observed by the Large Angle Spectroscopic Coronagraph (LASCO/SoHO), and the radio type II burst related to the shock was detected by the Nancay Decameter Array (France) and Izmiran radio spectrographs (Russia). An enhancement of the Si {xii} λ520 .66 line emitted by the compressed gas is clearly observed at the passage of the shock wave. The spectral profiles of both the O {vi} λ λ1031 .92 and 1037.61 and H~i Ly-α lines show broad wings caused by the emission from shocked material along the line of sight. We present the observations and preliminary results of the application of a three-dimensional model for the dynamics of the CME-driven shock wave. The CME event (and consequently, the CME-driven shock wave) is in fact directed out of the plane of the sky, so that its interpretation requires a more refined treatment with respect to events propagating approximately in the plane of the sky.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2001
- Bibcode:
- 2001AGUFMSH41B0749R
- Keywords:
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- 7509 Corona;
- 7513 Coronal mass ejections;
- 7534 Radio emissions;
- 7549 Ultraviolet emissions;
- 7851 Shock waves