Direct evidence of nonstationary collisionless shocks in space plasmas

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorDimmock, Andrew P.
dc.contributor.authorRussell, Christopher T.
dc.contributor.authorSagdeev, Roald Z.
dc.contributor.authorKrasnoselskikh, Vladimir
dc.contributor.authorWalker, Simon N.
dc.contributor.authorCarr, Christopher
dc.contributor.authorDandouras, Iannis
dc.contributor.authorEscoubet, C. Philippe
dc.contributor.authorGanushkina, Natalia
dc.contributor.authorGedalin, Michael
dc.contributor.authorKhotyaintsev, Yuri
dc.contributor.authorAryan, Homayon
dc.contributor.authorPulkkinen, Tuija
dc.contributor.authorBalikhin, Michael A.
dc.contributor.departmentSwedish Institute of Space Physics
dc.contributor.departmentUniversity of California Los Angeles
dc.contributor.departmentUniversity of Maryland
dc.contributor.departmentUniversity of California Berkeley
dc.contributor.departmentUniversity of Sheffield
dc.contributor.departmentImperial College London
dc.contributor.departmentUniversité de Toulouse
dc.contributor.departmentEuropean Space Agency - ESA
dc.contributor.departmentUniversity of Michigan, Ann Arbor
dc.contributor.departmentBen-Gurion University of the Negev
dc.contributor.departmentNASA Goddard Space Flight Center
dc.contributor.departmentDepartment of Electronics and Nanoengineering
dc.date.accessioned2019-05-06T09:03:51Z
dc.date.available2019-05-06T09:03:51Z
dc.date.issued2019-02
dc.description.abstractCollisionless shocks are ubiquitous throughout the universe: around stars, supernova remnants, active galactic nuclei, binary systems, comets, and planets. Key information is carried by electromagnetic emissions from particles accelerated by high Mach number collisionless shocks. These shocks are intrinsically nonstationary, and the characteristic physical scales responsible for particle acceleration remain unknown. Quantifying these scales is crucial, as it affects the fundamental process of redistributing upstream plasma kinetic energy into other degrees of freedom-particularly electron thermalization. Direct in situ measurements of nonstationary shock dynamics have not been reported. Thus, the model that best describes this process has remained unknown. Here, we present direct evidence demonstrating that the transition to nonstationarity is associated with electron-scale field structures inside the shock ramp.en
dc.description.versionPeer revieweden
dc.format.extent7
dc.format.mimetypeapplication/pdf
dc.identifier.citationDimmock , A P , Russell , C T , Sagdeev , R Z , Krasnoselskikh , V , Walker , S N , Carr , C , Dandouras , I , Escoubet , C P , Ganushkina , N , Gedalin , M , Khotyaintsev , Y , Aryan , H , Pulkkinen , T & Balikhin , M A 2019 , ' Direct evidence of nonstationary collisionless shocks in space plasmas ' , Science Advances , vol. 5 , no. 2 , 9926 . https://doi.org/10.1126/sciadv.aau9926en
dc.identifier.doi10.1126/sciadv.aau9926
dc.identifier.issn2375-2548
dc.identifier.otherPURE UUID: 063a6824-3c01-4551-8664-814650f54982
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/063a6824-3c01-4551-8664-814650f54982
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/32845774/ELEC_Dimmock_direct_evidence_of_nonstationary_science_advances.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/37586
dc.identifier.urnURN:NBN:fi:aalto-201905062706
dc.language.isoenen
dc.publisherAMER ASSOC ADVANCEMENT SCIENCE
dc.relation.ispartofseriesScience Advancesen
dc.relation.ispartofseriesVolume 5, issue 2en
dc.rightsopenAccessen
dc.subject.keywordWAVES OBSERVED UPSTREAM
dc.subject.keywordPERPENDICULAR SHOCKS
dc.subject.keywordMACH NUMBER
dc.subject.keywordBOW SHOCK
dc.titleDirect evidence of nonstationary collisionless shocks in space plasmasen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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