Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh23c1968t&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SH23C-1968
Astronomy and Astrophysics
Astrophysics
[2101] Interplanetary Physics / Coronal Mass Ejections, [7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections
Scientific paper
The evolution of coronal mass ejections (CMEs) is governed by the Lorentz and the drag force. Initially, the CME is launched and driven by the Lorentz force, whereas the drag force owing to the ambient solar wind controls the CME kinematics as it propagates into interplanetary (IP) space. The subject of the current study is to infer a heliospheric distance at which the drag force starts to prevail over the driving force. With the SECCHI instrument suite aboard STEREO, CMEs can be observed during their entire propagation all the way from Sun to 1 AU. In combination with in-situ measurements at 1 AU we are able to derive the direction and speed of a CME. This information is used as input to derive the kinematical behavior of well observed CME events in the IP distance regime, which is subsequently compared to the output from ENLIL (NASA/CCMC) MHD model runs for the ambient solar wind flow.
Moestl C.
Rollett Tanja
Temmer Manuela
Veronig Astrid M.
Vrsnak Bojan
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