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dc.contributor.authorAnagnostopoulos, Georgios C.
dc.contributor.authorPaschalidis, N.
dc.contributor.authorLittas, A. N.
dc.date.accessioned2014-11-13T22:01:04Z
dc.date.available2014-11-13T22:01:04Z
dc.date.issued2000
dc.identifier.citationAnagnostopoulos, G. C., Paschalidis, N., and Littas, A. N. (1999) Energy time dispersion of a new class of magnetospheric ion events observed near the Earth's bow shock. Annales Geophysicae., 18, 28-41.en_US
dc.identifier.urihttp://hdl.handle.net/11141/399
dc.description.abstractWe have analyzed high time resolution (\geq6 s) data during the onset and the decay phase of several energetic (\geq35 keV) ion events observed near the Earth's bow shock by the CCE/AMPTE and IMP-7/8 spacecraft, during times of intense substorm/geomagnetic activity. We found that forward energy dispersion at the onset of events (earlier increase of middle energy ions) and/or a delayed fall of the middle energy ion fluxes at the end of events are often evident in high time resolution data. The energy spectra at the onset and the decay of this kind of events show a characteristic hump at middle (50-120 keV) energies and the angular distributions display either anisotropic or broad forms. The time scale of energy dispersion in the ion events examined was found to range from several seconds to \sim1 h depending on the ion energies compared and on the rate of variation of the Interplanetary Magnetic Field (IMF) direction. Several canditate processes are discussed to explain the observations and it is suggested that a rigidity dependent transport process of magnetospheric particles within the magnetosheath is most probably responsible for the detection of this new type of near bow shock magnetospheric ion events. The new class of ion events was observed within both the magnetosheath and the upstream region.en_US
dc.language.isoen_USen_US
dc.rightsThis published article is available in accordance with the publisher's policy. It may be subject to U.S. Copyright Law.en_US
dc.rights.urihttp://www.annales-geophysicae.net/general_information/license_and_copyright.htmlen_US
dc.titleEnergy time dispersion of a new class of magnetospheric ion events observed near the Earth's bow shocken_US
dc.typeArticleen_US
dc.identifier.doi10.1007/s00585-000-0028-8


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