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Parker Solar Probe Observations of Solar Wind Energetic Proton Beams Produced by Magnetic Reconnection in the Near-Sun Heliospheric Current Sheet

dc.contributor.authorPHAN, T. D.
dc.contributor.authorVERNIERO, J. L.
dc.contributor.authorLARSON, D.
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierInstitut de recherche en astrophysique et planétologie [IRAP]
dc.contributor.authorLAVRAUD, B.
dc.contributor.authorDRAKE, J. F.
dc.contributor.authorØIEROSET, M.
dc.contributor.authorEASTWOOD, J. P.
dc.contributor.authorBALE, S. D.
dc.contributor.authorLIVI, R.
dc.contributor.authorHALEKAS, J. S.
dc.contributor.authorWHITTLESEY, P. L.
dc.contributor.authorRAHMATI, A.
dc.contributor.authorSTANSBY, D.
dc.contributor.authorPULUPA, M.
dc.contributor.authorMACDOWALL, R. J.
dc.contributor.authorSZABO, P. A.
dc.contributor.authorKOVAL, A.
dc.contributor.authorDESAI, M.
dc.contributor.authorFUSELIER, S. A.
dc.contributor.authorVELLI, M.
dc.contributor.authorHESSE, M.
dc.contributor.authorPYAKUREL, P. S.
dc.contributor.authorMAHESHWARI, K.
dc.contributor.authorKASPER, J. C.
dc.contributor.authorSTEVENS, J. M.
dc.contributor.authorCASE, A. W.
dc.contributor.authorRAOUAFI, N. E.
dc.date.issued2022
dc.identifier.issn0094-8276
dc.description.abstractEnWe report observations of reconnection exhausts in the Heliospheric Current Sheet (HCS) during Parker Solar Probe Encounters 08 and 07, at 16 R<SUB>s</SUB> and 20 R<SUB>s</SUB>, respectively. Heliospheric current sheet (HCS) reconnection accelerated protons to almost twice the solar wind speed and increased the proton core energy by a factor of ∼3, due to the Alfvén speed being comparable to the solar wind flow speed at these near-Sun distances. Furthermore, protons were energized to super-thermal energies. During E08, energized protons were found to have leaked out of the exhaust along separatrix field lines, appearing as field-aligned energetic proton beams in a broad region outside the HCS. Concurrent dropouts of strahl electrons, indicating disconnection from the Sun, provide further evidence for the HCS being the source of the beams. Around the HCS in E07, there were also proton beams but without electron strahl dropouts, indicating that their origin was not the local HCS reconnection exhaust.
dc.language.isoen
dc.publisherAmerican Geophysical Union
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/
dc.subject.enmagnetic reconnection
dc.subject.enparticle acceleration
dc.subject.ensolar wind
dc.subject.enparker solar probe
dc.subject.enheliospheric current sheet
dc.title.enParker Solar Probe Observations of Solar Wind Energetic Proton Beams Produced by Magnetic Reconnection in the Near-Sun Heliospheric Current Sheet
dc.typeArticle de revue
dc.identifier.doi10.1029/2021GL096986
dc.subject.halPlanète et Univers [physics]
bordeaux.journalGeophysical Research Letters
bordeaux.volume49
bordeaux.peerReviewedoui
hal.identifierinsu-03867499
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//insu-03867499v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Geophysical%20Research%20Letters&amp;rft.date=2022&amp;rft.volume=49&amp;rft.eissn=0094-8276&amp;rft.issn=0094-8276&amp;rft.au=PHAN,%20T.%20D.&amp;VERNIERO,%20J.%20L.&amp;LARSON,%20D.&amp;LAVRAUD,%20B.&amp;DRAKE,%20J.%20F.&amp;rft.genre=article


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