HR: 0830h
AN: SH21B-0166 [PDF]
TI: Comparison of ICME Leading Edge Orientations Determined by Single Spacecraft Techniques
AU: * Rees, A
EM: adam.rees@ic.ac.uk
AF: Imperial College London, Space and Atmospheric Physics Group,
The Blackett Lab.,
Prince Consort Road,, London, SW7 2BW
United Kingdom
AU: Owens, M J
EM: mathew.owens@ic.ac.uk
AF: Imperial College London, Space and Atmospheric Physics Group,
The Blackett Lab.,
Prince Consort Road,, London, SW7 2BW
United Kingdom
AU: Cargil, P
EM: p.cargill@ic.ac.uk
AF: Imperial College London, Space and Atmospheric Physics Group,
The Blackett Lab.,
Prince Consort Road,, London, SW7 2BW
United Kingdom
AU: Balogh, A
EM: a.balogh@ic.ac.uk
AF: Imperial College London, Space and Atmospheric Physics Group,
The Blackett Lab.,
Prince Consort Road,, London, SW7 2BW
United Kingdom
AU: Forsyth, R
EM: r.forsyth@ic.ac.uk
AF: Imperial College London, Space and Atmospheric Physics Group,
The Blackett Lab.,
Prince Consort Road,, London, SW7 2BW
United Kingdom
AB:
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.
DE: 2111 Ejecta, driver gases, and magnetic clouds
DE: 2134 Interplanetary magnetic fields
SC: SPA - Solar and Heliospheric Physics [SH]
MN: 2003 Fall Meeting