In Situ Measurements of the Variable Slow Solar Wind near Sector Boundaries

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dc.contributor.author Sanchez-Diaz, E.
dc.contributor.author Rouillard, A. P.
dc.contributor.author Lavraud, B.
dc.contributor.author Kilpua, E.
dc.contributor.author Davies, J. A.
dc.date.accessioned 2019-12-17T11:40:02Z
dc.date.available 2019-12-17T11:40:02Z
dc.date.issued 2019-09-01
dc.identifier.citation Sanchez-Diaz , E , Rouillard , A P , Lavraud , B , Kilpua , E & Davies , J A 2019 , ' In Situ Measurements of the Variable Slow Solar Wind near Sector Boundaries ' , Astrophysical Journal , vol. 882 , no. 1 , 51 . https://doi.org/10.3847/1538-4357/ab341c
dc.identifier.other PURE: 126975283
dc.identifier.other PURE UUID: 4713dad5-01f6-4e93-9c42-1a35dfb31473
dc.identifier.other WOS: 000484164800002
dc.identifier.other ORCID: /0000-0002-4489-8073/work/62280326
dc.identifier.uri http://hdl.handle.net/10138/308458
dc.description.abstract The release of density structures at the tip of the coronal helmet streamers, likely as a consequence of magnetic reconnection, contributes to the mass flux of the slow solar wind (SSW). In situ measurements in the vicinity of the heliospheric plasma sheet of the magnetic field, protons, and suprathermal electrons reveal details of the processes at play during the formation of density structures near the Sun. In a previous article, we exploited remote-sensing observations to derive a 3D picture of the dynamic evolution of a streamer. We found evidence of the recurrent and continual release of dense blobs from the tip of the streamers. In the present paper, we interpret in situ measurements of the SSW during solar maximum. Through both case and statistical analysis, we show that in situ signatures (magnetic field magnitude, smoothness and rotation, proton density, and suprathermal electrons, in the first place) are consistent with the helmet streamers producing, in alternation, high-density regions (mostly disconnected) separated by magnetic flux ropes (mostly connected to the Sun). This sequence of emission of dense blobs and flux ropes also seems repeated at smaller scales inside each of the high-density regions. These properties are further confirmed with in situ measurements much closer to the Sun using Helios observations. We conclude on a model for the formation of dense blobs and flux ropes that explains both the in situ measurements and the remote-sensing observations presented in our previous studies. en
dc.format.extent 12
dc.language.iso eng
dc.relation.ispartof Astrophysical Journal
dc.rights unspecified
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject MAGNETIC RECONNECTION
dc.subject DENSITY STRUCTURES
dc.subject CONNECTION
dc.subject ELECTRONS
dc.subject MISSION
dc.subject AU
dc.subject 115 Astronomy, Space science
dc.title In Situ Measurements of the Variable Slow Solar Wind near Sector Boundaries en
dc.type Article
dc.contributor.organization Space Physics Research Group
dc.contributor.organization Particle Physics and Astrophysics
dc.contributor.organization Department of Physics
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.3847/1538-4357/ab341c
dc.relation.issn 0004-637X
dc.rights.accesslevel openAccess
dc.type.version acceptedVersion

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