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Paper: Comparison of the Stream Structure and Coronal Sources of the Solar Wind During the April 7 & May 12, 1997 Halo CMEs
Volume: 346, Large-scale Structures and their Role in Solar Activity
Page: 371
Authors: Arge, C.; deToma, G.; Luhmann, J.
Abstract: We report on our efforts to model the ambient solar wind out to 1AU around the times of the April 7 and May 12, 1997 halo coronal mass ejections (CMEs) and to identify their coronal source regions. We use the simple physics and empirical based Wang-Sheeley-Arge (WSA) model driven by daily updated photospheric field synoptic maps from Mount Wilson Solar Observatory to accomplish this. The results generated by the WSA model for each event are then compared with the WIND satellite observations near Earth, as well as with SOHO/EIT data. We find that the model describes the observed ambient solar wind stream structure of the May 12 CME generally well, except for the ejecta itself. The same is essentially true for the April 7 event, except that in this case it fails to capture the moderately high-speed ambient stream that followed behind the CME ejecta.
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