Hinode, STEREO and SOHO obervations of a CME event

Astronomy and Astrophysics – Astrophysics

Scientific paper

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[7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections, [7531] Solar Physics, Astrophysics, And Astronomy / Prominence Eruptions, [7549] Solar Physics, Astrophysics, And Astronomy / Ultraviolet Emissions

Scientific paper

Coronal Mass Ejections (CMEs) are among the most dramatic and violent dynamic events occurring in the solar atmosphere, and have significant impact on the near-Earth environment. So far, the physical processes responsible for their release and acceleration have not been completely understood, in part because of the lack of direct measurements of the CME plasma phycical parameters and evolution during the CME onset. Here we describe the analysis of multiwavelength observations from Hinode, SOHO and STEREO of the very early phases of a CME observed during the Whole Heliospheric Interval campaign. SECCHI/EUVI, SECCHI/COR1, SOHO/EIT and SOHO/LASCO images are used to reconstruct the 3D trajectory, velocity and acceleration up to 20 solar radii. Hinode/EIS, Hinode/XRT and SOHO/UVCS high resolution EUV spectra and X-ray images are used to measure the physical properties and the thermal structure of the core of the CME ejecta as a function of time up to 2.0 solar radii. The physical properties of the current sheet that formed after the CME erupted are also measured as a function of time.

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