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Magnetic field rotation and transition width in rotational discontinuities and Alfven wave trains


Metadata FieldValueLanguage
dc.contributorYu Lin, linyu01@auburn.eduen_US
dc.creatorLin, Y.
dc.creatorLee, LC.
dc.date.accessioned2020-06-30T19:57:53Z
dc.date.available2020-06-30T19:57:53Z
dc.date.created2000-01
dc.identifier10.1029/1999JA900380en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/1999JA900380en_US
dc.identifier.urihttp://hdl.handle.net/11200/49908
dc.description.abstractA hybrid simulation is carried out to study the evolution of magnetic field rotations in rotational discontinuities (RDs) and large-amplitude Alfven wave trains (AWTs) whose initial field rotation angle \Delta Phi\ > 180 degrees. For a given initial half width D, the RDs or AWTs lose a multiple of +/-360 degrees field rotation at a critical time, until a smallest rotation angle \Delta Phi\ < 180 degrees is reached. The critical time t(c) for losing the first 360 degrees field rotation is found to be t(c) similar or equal to F(Delta Phi, beta(1), theta(Bn))D(3.3+/-0.8), where the function F decreases linearly with Delta Phi, decreases linearly with root beta(1) for upstream ion beta beta(1) > 0.1, and decreases with decreasing shock normal angle theta(Bn). At t < t(c), however, the rotation angle Delta Phi remains unchanged. A search is conducted for minimum widths required for RDs to preserve their \Delta Phi\ > 180 degrees for a given transient convection time at the dayside magnetopause and minimum widths of AWTs per 360 degrees field rotation in the solar wind.en_US
dc.formatPDFen_US
dc.publisherAMER GEOPHYSICAL UNIONen_US
dc.relation.ispartofJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICSen_US
dc.relation.ispartofseries0148-0227en_US
dc.subjectDIRECTIONAL DISCONTINUITIES; HYDROMAGNETIC-WAVES; MAGNETOPAUSE; RECONNECTION; GENERATION; EVOLUTION; STABILITY; MODELS; SHOCK; MHDen_US
dc.titleMagnetic field rotation and transition width in rotational discontinuities and Alfven wave trainsen_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume105en_US
dc.citation.issueA1en_US
dc.citation.spage139en_US
dc.citation.epage155en_US
dc.description.statusPublisheden_US
dc.creator.orcid0000-0001-8003-9252en_US

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