The two Ba releases in the solar wind, termed artificial comets (the first in interplanetary space, the second in the terrestrial magnetosheath), showed a number of common magnetic features. Both times a magnetic cavity was detected and a field pile-up observed with magnitudes several times the ambient field strength upstream of the cavity. The magnetic fluctuations in the compressed region are generally enhanced by a factor comparable to the amount of field pile-up. There is a peak in the spectra of both events around 0.1 Hz in the component which is perpendicular to the solar-wind velocity vector and almost field-aligned. This magnetosonic wave has been interpreted as the fundamental mode of resonance oscillations of the compression zone. For frequencies beyond 2 Hz the spectra decrease more steeply in the case of the second 'comet' than in the first. This is due to the interaction of the supersonic solar wind with the first comet. The spectra obtained during the first comet at the solar-wind/ion-cloud interface are identical to those observed during bow-shock crossings.


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    Titel :

    Magnetic ULF fluctuations in the compressional zone of AMPTE's artificial comets


    Beteiligte:
    Kloecker, N. (Autor:in) / Luehr, H. (Autor:in) / Southwood, D. J. (Autor:in) / Acuna, M. H. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1988-01-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Magnetic ULF fluctuations in the compressional zone of AMPTE's artificial comets

    Klöcker, N. / Lühr, H. / Southwood, D.J. et al. | Elsevier | 1988


    Images of the AMPTE artificial comets

    Mendillo, Michael / Baumgardner, Jeffrey / Chuang, Hann-Bin | NTRS | 1990


    Images of the AMPTE artificial comets

    Mendillo, Michael / Baumgardner, Jeffrey / Chuang, Hann-Bin | Elsevier | 1989


    Comets

    Engineering Index Backfile | 1953


    UNRELIABLE COMETS

    Moore, Patrick | Online Contents | 1995