Physics – Plasma Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsh13b1514v&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SH13B-1514
Physics
Plasma Physics
[7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections, [7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields, [7833] Space Plasma Physics / Mathematical And Numerical Techniques, [7959] Space Weather / Models
Scientific paper
Magnetic clouds are large interplanetary flux ropes. Commonly their magnetic field configuration is fitted by a constant-alpha force-free field in a cylinder (Lundquist solution). A characteristic feature of magnetic clouds is a large rotation of the magnetic field vector. In some cases, the rotation exceeds 180 degrees and it is interpreted as a signature that the flux rope is curved. Here fits by the above mentioned solution fail and another solution is needed, a constant-alpha force-free solution in a toroid. A rather complex exact analytical solution (Tsuji solution) is compared with approximate simpler ones and fits of several magnetic clouds are presented.
Romashets Eugene
Vandas Marek
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