This Is Auburn

Show simple item record

Hybrid simulation of foreshock waves and ion spectra and their linkage to cusp energetic ions


Metadata FieldValueLanguage
dc.contributorYu Lin, linyu01@auburn.eduen_US
dc.creatorWang, X. Y.
dc.creatorLin, Y.
dc.creatorChang, S. -W.
dc.date.accessioned2020-06-16T19:21:42Z
dc.date.available2020-06-16T19:21:42Z
dc.date.created2009-06
dc.identifier10.1029/2008JA013745en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2008JA013745en_US
dc.identifier.urihttp://hdl.handle.net/11200/49882
dc.description.abstractA three-dimensional global hybrid simulation is carried out to investigate energetic ions and electromagnetic waves in the quasi-parallel (Q-parallel to) bow shock and cusp for a typical interplanetary magnetic field configuration during the cusp energetic particle events. The bow shock, magnetosheath, and dayside magnetosphere form by interaction between the solar wind and geomagnetic dipole field. Ions of solar wind characteristics injected into the system evolve along with electromagnetic waves in a self-consistent manner. Several important features are yielded from the simulation. Solar wind ions are accelerated by the waves and turbulence at the bow shock and foreshock as indicated by the ion distribution. The shock-accelerated ions possess an exponential energy spectrum with their differential flux scaled by the field-aligned distance to the bow shock, consistent with satellite observations. Second, the compressive and transversal waves in the foreshock are strongly correlated with the diffuse ion dynamics. Third, energetic ions in the magnetosheath and cusp downstream from the Q-k shock also exhibit a spectrum similar to those at the shock. By tracing trajectories of cusp energetic ions in the simulation, the origin of these ions is revealed. Their source is predominantly associated with the Fermi acceleration at the Q-k shock and foreshock. Waves in the magnetosheath and cusp, as well as magnetic reconnection at the high-latitude magnetopause, are relatively insignificant in accelerating cusp energetic particles.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.subjectEARTHS BOW SHOCK; ULF POWER SPECTRA; HIGH-ALTITUDE CUSP; MAGNETOSPHERIC CUSPS; MAGNETOSHEATH IONS; MEV HELIUM; ET-AL; CLUSTER OBSERVATIONS; ACCELERATION REGION; PARTICLE EVENTSen_US
dc.titleHybrid simulation of foreshock waves and ion spectra and their linkage to cusp energetic ionsen_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume114en_US
dc.description.statusPublisheden_US
dc.creator.orcid0000-0001-5533-5981en_US
dc.creator.orcid0000-0001-8003-9252en_US

Files in this item

Show simple item record