Direct observations of the formation of the solar wind halo from the strahl

dc.contributor.authorGurgiolo, C.
dc.contributor.authorGoldstein, Melvyn
dc.contributor.authorViñas, A. F.
dc.contributor.authorFazakerley, A. N.
dc.date.accessioned2023-11-21T19:50:16Z
dc.date.available2023-11-21T19:50:16Z
dc.date.issued2012-01-17
dc.description.abstractObservations of a continual erosion of the strahl and build up of the halo with distance from the sun suggests that, at least in part, the halo may be formed as a result of scattering of the strahl. This hypothesis is supported in this paper by observation of intense scattering of strahl electrons, which gives rise to a proto-halo electron population. This population eventually merges into, or becomes the halo. The fact that observations of intense scattering of the strahl are not common implies that the formation of the halo may not be a continuous process, but one that occurs, in part, in bursts in regions where the conditions responsible for the scattering are optimum.
dc.description.sponsorshipThe authors would like to acknowledge the work and role the Cluster Active Archive (CAA) and thank the EFW, WHISPER and FGM teams for providing the data used in this study. We would also like to acknowledge the PEACE team at MSSL who worked on and are constantly improving the instrument calibration. CG would like to acknowledge support from NASA Grant NNX10AC90G.
dc.description.urihttps://angeo.copernicus.org/articles/30/163/2012/
dc.format.extent13 pages
dc.genrejournal articles
dc.identifier.citationGurgiolo, C., Goldstein, M. L., Viñas, A. F., and Fazakerley, A. N.: Direct observations of the formation of the solar wind halo from the strahl, Ann. Geophys., 30, 163–175, https://doi.org/10.5194/angeo-30-163-2012, 2012.
dc.identifier.urihttps://doi.org/10.5194/angeo-30-163-2012
dc.identifier.urihttp://hdl.handle.net/11603/30832
dc.language.isoen_US
dc.publisherEGU
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Goddard Planetary Heliophysics Institute (GPHI)
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
dc.rightsPublic Domain Mark 1.0en
dc.rights.urihttps://creativecommons.org/publicdomain/mark/1.0/
dc.titleDirect observations of the formation of the solar wind halo from the strahl
dc.typeText
dcterms.creatorhttps://orcid.org/0000-0002-5317-988X

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