This Is Auburn

Show simple item record

Simulation of pressure pulses in the bow shock and magnetosheath driven by variations in interplanetary magnetic field direction


Metadata FieldValueLanguage
dc.creatorLin, Y
dc.creatorSwift, DW
dc.creatorLee, LC
dc.date.accessioned2022-10-25T21:16:30Z
dc.date.available2022-10-25T21:16:30Z
dc.date.created1996
dc.identifier10.1029/96JA02733en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/96JA02733en_US
dc.identifier.urihttps://aurora.auburn.edu/handle/11200/50423
dc.identifier.urihttp://dx.doi.org/10.35099/aurora-491
dc.description.abstractTwo-dimensional (2-D) hybrid simulations are carried out to study the effects of the variation in the interplanetary magnetic field (IMF) direction on the bow shock, magnetosheath, and magnetosphere. A curvilinear coordinate system is used in the simulation. The 2-D simulation is also compared with our one-dimensional simulation results. It is found that pressure pulses are generated as a result of the interaction between the bow shock (BS) and an interplanetary rotational discontinuity (RD). First, a structure consisting of a rotational discontinuity and two slow shocks are present downstream of the bow shock after the BS/RD interaction. The magnetic field and plasma density are anticorrelated in this structure, The dynamic pressure increases in the structure, leading to a pressure pulse in the magnetosheath. Second, a pressure pulse associated with reflected ions at the bow shock may be generated in the foreshock when the IMF changes its direction, especially when a local quasi-parallel bow shock becomes a quasi-perpendicular shock. The magnetic field, plasma density, and dynamic pressure are positively correlated in the upstream pressure pulse. This pressure pulse convects through and interacts with the bow shock, producing; a pressure pulse in the downstream region. The downstream pressure pulses propagate to the magnetopause. The amplitude of the downstream pressure pulses can be up to 100% of the background magnetosheath value. It is suggested that the pressure pulses impinging on the magnetopause may lead to the magnetic impulse events observed in the high-latitude ionosphere.en_US
dc.formatPDFen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.ispartofJournal of Geophysical Research: Space Physicsen_US
dc.relation.ispartofseries2169-9380en_US
dc.rights© American Geophysical Union 1996. This is this the version of record co-published by the American Geophysical Union and John Wiley & Sons, Inc. It is made available under the CC-BY-NC-ND 4.0 license. Item should be cited as: Lin, Y., Swift, D. W., & Lee, L. C. (1996). Simulation of pressure pulses in the bow shock and magnetosheath driven by variations in interplanetary magnetic field direction. Journal of Geophysical Research: Space Physics, 101(A12), 27251-27269.en_US
dc.titleSimulation of pressure pulses in the bow shock and magnetosheath driven by variations in interplanetary magnetic field directionen_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume101en_US
dc.citation.issueA12en_US
dc.citation.spage27251en_US
dc.citation.epage27269en_US
dc.description.statusPublisheden_US
dc.creator.orcid0000-0003-4012-991Xen_US

Files in this item

Show simple item record