Other
Scientific paper
Dec 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.5579f&link_type=abstract
Journal of Geophysical Research, vol. 83, Dec. 1, 1978, p. 5579-5585.
Other
18
Current Sheets, Interplanetary Magnetic Fields, Magnetic Field Configurations, Satellite Observation, Astronomical Models, Diamagnetism, Hole Distribution, Imp
Scientific paper
Current density profiles in several types of interplanetary magnetic holes have been calculated using high-resolution Imp 6 magnetic field data (12.5 vector measurements/s), assuming that the currents flow in planar sheets and that the magnetic field varies only in the direction normal to the sheet. The planarity was verified in four holes which were observed by two suitably spaced spacecraft. Four types of simple magnetic holes are discussed, in which B varies nearly monotonically on each side of the hole. In two of the holes, B varies in intensity but not in direction as a result of currents normal to B. In the other two holes, B changes in both magnitude and direction as a result of currents both normal and parallel to B. The observed structures are found to be qualitatively consistent with the models of Burlaga and Lemaire (1978). Examples of complex irregular magnetic holes are also presented, and they are shown to contain multiple current sheets in which currents flow parallel to one another at various angles with respect to B. There is no model of such magnetic holes at present.
Burlaga Leonard Francis
Fitzenreiter Richard J.
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