Physics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh21b0166r&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SH21B-0166
Physics
2111 Ejecta, Driver Gases, And Magnetic Clouds, 2134 Interplanetary Magnetic Fields
Scientific paper
In this investigation we examine the leading edge orientation and morphology of ICMEs observed by interplanetary spacecraft. In particular we compare and contrast three independent techniques for determining this leading edge orientation. First, if a magnetic cloud is associated with an ICME then it is possible to fit a constant alpha, force-free magnetic flux rope model to the data. This allows the determination of axis orientations and chiralities. If planar magnetic structures are present in the sheath region, general ahead of faster ICMEs, then the orientations of these planes give insights into the axis orientation and the shape of the leading edge of the ICME. Finally, examining plasma flow deflections, again in the sheath region, will also give clues to the cross-sectional morphology as the deflections are linked to the leading edge morphology of the ICME and its axis orientation.
Balogh André
Cargil P.
Forsyth Robert
Owens Mathew J.
Rees Adam
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