Global Structure of Interplanetary Coronal Mass Ejections Retrieved from the Model Fitting Analysis of Radio Scintillation Observations

Details Global Structure of Interplanetary Coronal Mass Ejections Retrieved from the Model Fitting Analysis of Radio Scintillation Observations Global Structure of Interplanetary Coronal Mass Ejections Retrieved from the Model Fitting Analysis of Radio Scintillation Observations

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aipc..679..729t&link_type=abstract

SOLAR WIND TEN: Proceedings of the Tenth International Solar Wind Conference. AIP Conference Proceedings, Volume 679, pp. 729-7

Physics

3

Particle Emission, Solar Wind, Solar Wind Plasma, Sources Of Solar Wind

Scientific paper

Interplanetary scintillation (IPS) measurements made with the Solar-Terrestrial Environment Laboratory, Nagoya University, multi-station system at 327 MHz are used to study the global structure of the interplanetary counterpart of coronal mass ejections (so-called interplanetary CMEs or ICMEs). We have analyzed our IPS data of four ICME events which occurred successively in July 2000; those are 2000 July 10, 11, 12 and 14 events (the last one corresponds to ``Bastille day event''). We have employed the model fitting method to obtain unbiased three-dimensional properties of ICME from IPS observations. The parameters determined here include the location of the ICME center, the e-folding radial thickness and angular span, anisotropy of the angular extent, the local enhancement factor, the (average) expansion speed, and its angular dependence. The results suggest that the global shape of July 12 and 14 events were loop-like the latitude angular span of these events was much smaller than the longitude one. The July 10 and 11 events are found to be explained excellently by a shell-shape ICME model. The mass contained by the ICME has been estimated using information on the global structure obtained here.

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