SSP seminar

Monday 9th, November 2009, 12:00pm
Pratt Conference Room, 60 Garden Street

Enrico Landi (NRL) - Physical conditions in a CME from Hinode, STEREO, and SOHO observations.

In the present work we analyze multiwavelength observations from Hinode, SOHO and STEREO of the early phases of a Coronal Mass Ejection (CME). We use Hinode/EIS and SOHO/UVCS high resolution spectra to measure the physical properties of the CME ejecta as a function of time at 1.1 and 1.9 solar radii. Hinode/XRT images are used in combination with EIS spectra to constrain the high temperature plasma properties of the ejecta. SECCHI/EUVI, SECCHI/COR1 and SOHO/LASCO images are used to measure the CME velocity and acceleration. The combination of measurements of plane of the sky velocities and line of sight speeds from EIS and UVCS Doppler shifts allows us to determine the absolute velocities of the CME plasma at 1.1 and 3.0 solar radii. Plasma properties, dynamical status, thermal structure and brightness distributions are used to constrain the energy contents of the CME plasma and to compare it to theoretical predictions from models of CME plasma heating and acceleration.


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