TY - JOUR
TI - MHD simulation of an interaction of a shock wave with a magnetic cloud
AU - Vandas, M.
AU - Fischer, S.
AU - Dryer, M.
AU - Smith, Z.
AU - Detman, T.
AU - Geranios, A.
JO - Journal of Geophysical Research A: Space Physics
PY - 1997
VL - 102
TODO - A10
SP - 22295-22300
PB - AMERICAN GEOPHYSICAL UNION
SN - null
TODO - 10.1029/97JA01675
TODO - null
TODO - Interplanetary shock waves, propagating in the heliosphere faster than earlier-emitted coronal ejecta, penetrate them and modify their parameters during this interaction. Using two and one half dimensional MHD simulations, we show how a magnetic cloud (flux rope) propagating with a speed 3 times higher than the ambient solar wind is affected by an even faster traveling shock wave overtaking the cloud. The magnetic field increases inside the cloud during the interaction as it is compressed in the radial direction and becomes very oblate. The cloud is also accelerated and moves faster, as a whole, while both shocks (driven by the cloud and the faster interplanetary shock) merge upstream of the cloud. This interaction may be a rather common phenomenon due to the frequency of coronal mass ejections and occurrence of shock waves during periods of high solar activity. Copyright 1997 by the American Geophysical Union.
ER -