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Towards understanding magnetic holes: Hybrid simulations
Author(s) -
Baumgärtel K.,
Sauer K.,
Dubinin E.
Publication year - 2003
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2003gl017373
Subject(s) - plasma , instability , magnetic field , isotropy , physics , anisotropy , astrophysical plasma , computational physics , magnetohydrodynamics , feature (linguistics) , geophysics , condensed matter physics , mechanics , optics , nuclear physics , quantum mechanics , linguistics , philosophy
One‐dimensional hybrid code simulations are presented which show that magnetic field depletions of variable length and depht can be maintained over long time in mirror‐stable high‐β plasmas under certain conditions while magnetic compressions cannot. This suggests that short‐scale magnetic holes (MHs), frequently observed in space plasmas, may be a feature of an essentially isotropic rather than a mirror‐unstable plasma. This suggestion is supported by additional simulations in anisotropic plasmas which reveal that localized magnetic depressions are not a typical feature of saturated states of the mirror instability.