Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh23b1863p&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SH23B-1863
Astronomy and Astrophysics
Astrophysics
[7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections
Scientific paper
To study the kinematic and morphological evolution of CMEs, we utilize the STEREO/SECCHI observations to track CMEs from the solar surface to the interplanetary space . We apply the 3-D Raytrace model, which assumes a CME to be a flux-rope-like structure, to quantitatively characterize CMEs in both STEREO A and B images. The obtained CME parameters (launching longitude and latitude, angular width, distance, cross-section size, and tilt angle) are free of projection effect . We find that the velocity of CMEs in the interplanetary space follows an exponential function with distance, for both acceleration and deceleration events. CME velocity tends to approach an asymptotic value after 50 solar radii. We have developed a theoretical flux rope model to explain the observed CME evolution in the interplanetary space.
Poomvises Watanachak
Zhang James J.
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