August 3, 2012, 2:30 pm - 3:30 pm

August 3, 2:30 pm - 3:30 pm

Force Balance in the Evolution of ICMEs: How Lazy are CME's between the Sun and the Earth?

Dr. Daniel Berdichevsky, NASA GSFC/Sigma Space

The observation: (a) remote of the coronal mass ejection (CME), and (b) in-situ of plasma and magnetic field during the 23th solar minimum with multiple space-science spacecraft (SC) allowed the identification of a class of CMEs that seems to travel away from the Sun in a way, as a whole, consistent with uniform motion. Here we present a possible explanation of this behavior of these observations for a class of CMEs. We do that in the formalism of the magnetohydrodynamics (MHD). The implications for this assumption provide a simple connection between the poloidal magnetic field of the CME with its mass. In the process to find this novel solution, the shape of the CME is derived, showing a deviation from the simple circular cross-section for the magnetic flux-rope (FR) expansion free of interactions derived in Berdichevsky, Lepping and Farrugia, PR E67, 2003. Finally we present three applications of this model showing that it provides sensible results in the prediction of the estimated mass both remote as in-situ observed mean density of the plasma in the path of the interplanetary CME, see also Berdichevsky, Solar Phys., accepted, 2012.