Properties and Modeling of a CME-driven Shock out of the Plane of the sky Through UVCS/SoHO Observations

Details Properties and Modeling of a CME-driven Shock out of the Plane of the sky Through UVCS/SoHO Observations Properties and Modeling of a CME-driven Shock out of the Plane of the sky Through UVCS/SoHO Observations

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsh41b0749r&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SH41B-0749

Physics

7509 Corona, 7513 Coronal Mass Ejections, 7534 Radio Emissions, 7549 Ultraviolet Emissions, 7851 Shock Waves

Scientific paper

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.

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