Multiple Flux-Rope Magnetic Ejecta in the Solar Wind: Separated Flux Ropes

Details Multiple Flux-Rope Magnetic Ejecta in the Solar Wind: Separated Flux Ropes Multiple Flux-Rope Magnetic Ejecta in the Solar Wind: Separated Flux Ropes

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh22a0191h&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SH22A-0191

Physics

2111 Ejecta, Driver Gases, And Magnetic Clouds, 2134 Interplanetary Magnetic Fields, 2164 Solar Wind Plasma, 7513 Coronal Mass Ejections, 7843 Numerical Simulation Studies

Scientific paper

Recent studies (Hu et al., 2003a,b) have shown that multiple flux-rope configuration of magnetic ejecta in the solar wind at 1 AU is not rare. Those authors examined ACE magnetic and plasma data for the years 1998-2000. They found about 4 double flux-rope ejecta events and 1 triplet among 31 events which were identified by primarily looking at magnetic field measurement for flux rope signatures. The data analysis technique employed is capable of generating a two and a half dimensional cross-section of the structure convecting past the spacecraft by solving the plane Grad-Shafranov equation directly utilizing spacecraft data as spatial initial input. The results showed multiple non-axisymmetric cylindrical flux ropes nested within a boundary surface. They were assumed to have exactly the same axis orientation. Further analysis will be carried out by examining the individual flux rope in a multiple rope system separately. The individual field line twist and relative orientation between flux-rope axes will be reported. Implications of X-point formation in a presumably twisted multiple flux-rope system will be discussed. Multi-spacecraft validation of these results will be presented. Possible solar connections of these systems, such as the comparison of the signs of magnetic helicity, will be explored.

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