Propagation of coronal mass ejections in the interplanetary medium

Details Propagation of coronal mass ejections in the interplanetary medium Propagation of coronal mass ejections in the interplanetary medium

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh32a..02t&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SH32A-02

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2101 Coronal Mass Ejections (7513), 2111 Ejecta, Driver Gases, And Magnetic Clouds, 2139 Interplanetary Shocks, 2164 Solar Wind Plasma

Scientific paper

We report interplanetary scintillation (IPS) observations of two full-halo coronal mass ejections (CMEs) during October-November, 2003. An enhanced scintillation region elongated from the northeast to the southwest of the sun has been identified in our IPS observations of the fast full-halo CME event on October 28, 2003. The propagation speed of this disturbance is found to be much slower than the IP shock. Our IPS observations are basically consistent with the 3-dimensional (3D) density reconstruction from SMEI observations. A traveling interplanetary (IP) disturbance associated with the November 2, 2003 full-halo CME has been detected and tracked from our IPS observations for two consecutive days. Plane-of-sky distances of our IPS observations are in good agreement with those of SMEI and Wind/WAVES observations. The 3D distribution of the enhanced scintillation region reconstructed from earlier IPS data of this CME event is considered to represent the shock compression region. Our IPS observations suggests that deceleration of the CME within 0.5 AU is insignificant. On the other hand, a loop-shaped distribution of the enhanced scintillation region has been reconstructed from later IPS data of this CME event. The propagation speed of this loop structure is much slower than that estimated from earlier IPS data. We consider that later IPS observations of the 2003 November 2 CME event may represent an internal part of the CME system rather than the shock compression region, as is the case of the October 28, 2003 event.

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