Magnetic clouds at sector boundaries

Details Magnetic clouds at sector boundaries Magnetic clouds at sector boundaries

Jan 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jgr...103..301c&link_type=abstract

Journal of Geophysical Research, vol. 10, p. 301

Physics

54

Magnetic Clouds, Solar Wind, Gyromagnetism, Solar Magnetic Field, Solar Electrons, Electron Distribution, Transient Response, Satellite Observation, Free Boundaries, Solar Flux

Scientific paper

Eight of the 14 magnetic clouds in the period August 1978 to February 1982, previously identified in solar wind data by their smooth magnetic field rotations, were encountered at sector boundaries. Most of these differed from those not encountered at sector boundaries in two ways. First, the accompanying counterstreaming electrons, indicating closed magnetic topology, on average spanned intervals more than twice as long as the identified clouds. Second, the field rotations within the identified clouds appear to form part of larger-scale rotations beyond the cloud boundaries that roughly coincide with the counterstreaming electrons. The results suggest that the documented clouds were parts of larger transient structures that are best observed in their entirety at sector boundaries. The data are consistent with spacecraft passages through both the leading and trailing sections of kinematically distorted flux rope loops rooted to the sun.

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