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Detailed Reference Information |
Vandas, M. and Geranios, A. (2001). November 17–18, 1975, event: A clue to an internal structure of magnetic clouds?. Journal of Geophysical Research 106: doi: 10.1029/2000JA900121. issn: 0148-0227. |
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During November 17--18, 1975, a magnetic cloud was observed by the IMP 8 satellite. The cloud was analyzed in several papers. It draws attention because it is the most clear example where the magnetic field components behave differently from the current single flux rope model. Various models and fits have been presented to explain the magnetic field measurements for this particular event: single-polarity cylindrical flux rope, spheromak, toroidal flux rope, and two subsequent flux ropes (flux rope twins). We critically examine these models and fits and stress that not only magnetic field data but also plasma data must be taken into account. There is a remarkably sharp drop in the density inside the magnetic cloud. The most consistent explanation of the behavior of magnetic field and plasma data for this event is that the magnetic cloud consists of a dual-polarity flux rope with a low density and strong magnetic field core surrounded by an annular region of the same chirality but opposite polarity. An implication of this possibility to explain other magnetic cloud observations is discussed. ¿ 2001 American Geophysical Union |
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Abstract |
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Keywords
Interplanetary Physics, Interplanetary magnetic fields, Interplanetary Physics, Solar wind plasma, Solar Physics, Astrophysics, and Astronomy, Coronal mass ejections |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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