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STEREO Direct Imaging of a CME-driven Shock to 0.5AU  

Shane Maloney   Submitted: 2011-06-08 10:49

This abstract was corrupted following database problems and is being recovered. It will be restored as quickly as possible. Any questions, please send them to Alisdair. Sorry for any incovenience.


Authors: Shane A. Maloney and Peter T. Gallagher
Projects: STEREO

Publication Status: ApjL (in press)
Last Modified: 2011-06-09 08:58
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Solar Wind Drag and the Kinematics of Interplanetary Coronal Mass Ejections  

Shane Maloney   Submitted: 2010-10-03 19:10

Coronal mass ejections (CMEs) are large-scale ejections of plasma and magnetic field from the solar corona, which propagate through interplanetary space at velocities of sim100-2500 km s-1. Although plane-of-sky coronagraph measurements have provided some insight into their kinematics near the Sun (<32~R_odot), it is still unclear what forces govern their evolution during both their early acceleration and later propagation. Here, we use the dual perspectives of the Solar TErrestrial RElations Observatory (STEREO) spacecrafts to derive the three-dimensional kinematics of CMEs over a range of heliocentric distances (sim2-250,Rodot). We find evidence for solar wind (SW) drag-forces acting in interplanetary space, with a fast CME decelerated and a slow CME accelerated towards typical SW velocities. We also find that the fast CME showed linear (delta=1) dependence on the velocity difference between the CME and the SW, while the slow CME showed a quadratic (delta=2) dependence. The differing forms of drag for the two CMEs indicate the forces and thus mechanism responsible for there acceleration may be different.

Authors: Shane, A. Maloney, Peter, T. Gallagher
Projects: STEREO

Publication Status: In press
Last Modified: 2010-10-04 18:07
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STEREO Direct Imaging of a CME-driven Shock to 0.5AU
Solar Wind Drag and the Kinematics of Interplanetary Coronal Mass Ejections

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