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Asymmetry in the CME-CME interaction process for the events from 2011 February 14-15 View all abstracts by submitter

Manuela Temmer   Submitted: 2014-02-28 01:23

We present a detailed study of the interaction process of two coronalmass ejections (CMEs) successively launched on 2011 February 14 (CME1)and 2011 February 15 (CME2). Reconstructing the 3D shape and evolutionof the flux ropes we verify that the two CMEs interact. The frontalstructure of both CMEs measured along different position angles (PA)over the entire latitudinal extent, reveals differences in thekinematics for the interacting flanks and the apexes. The interactionprocess is strongly PA-dependent in terms of timing as well askinematical evolution. The central interaction occurs along PA-100°,which shows the strongest changes in kinematics. During interaction,CME1 accelerates from ~400 km s-1 to ~700 km s-1 and CME2 decelerates from~1300 km s-1 to ~600 km s-1. Our results indicate that a simplifiedscenario like inelastic collision may not be sufficient to describethe CME-CME interaction. Magnetic field structures of the intertwiningflux ropes as well as momentum transfer due to shocks play animportant role in the interaction process.

Authors: M. Temmer, A. M. Veronig, V. Peinhart, B. Vrsnak

Publication Status: ApJ (accepted)
Last Modified: 2014-03-04 16:08
Go to main E-Print page  New Vacuum Solar Telescope observations of a flux rope tracked by a filament activation  Rayleigh-Taylor instabilities with sheared magnetic fields  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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