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dc.contributor.author
Mandrini, Cristina Hemilse
dc.contributor.author
Pohjolainen, S.
dc.contributor.author
Dasso, Sergio Ricardo
dc.contributor.author
Green, L. M.
dc.contributor.author
Démoulin, Pascal
dc.contributor.author
van Driel Gesztelyi, Lidia
dc.contributor.author
Copperwheat, C.
dc.contributor.author
Foley, C.
dc.date.available
2017-07-26T14:24:58Z
dc.date.issued
2005-12
dc.identifier.citation
Mandrini, Cristina Hemilse; Pohjolainen, S.; Dasso, Sergio Ricardo; Green, L. M.; Démoulin, Pascal; et al.; Interplanetary flux rope ejected from an X-ray bright point: The smallest magnetic cloud source-region ever observed; EDP Sciences; Astronomy and Astrophysics; 434; 2; 12-2005; 725-740
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/21322
dc.description.abstract
Using multi-instrument and multi-wavelength observations (SOHO/MDI and EIT, TRACE and Yohkoh/SXT), as well as computing the coronal magnetic field of a tiny bipole combined with modelling of Wind in situ data, we provide evidences for the smallest event ever observed which links a sigmoid eruption to an interplanetary magnetic cloud (MC). The tiny bipole, which was observed very close to the solar disc centre, had a factor one hundred less flux than a classical active region (AR). In the corona it had a sigmoidal structure, observed mainly in EUV, and we found a very high level of non-potentiality in the modelled magnetic field, 10 times higher than we have ever found in any AR. From May 11, 1998, and until its disappearance, the sigmoid underwent three intense impulsive events. The largest of these events had extended EUV dimmings and a cusp. The Wind spacecraft detected 4.5 days later one of the smallest MC ever identified (about a factor one hundred times less magnetic flux in the axial component than that of an average MC). The link between this last eruption and the interplanetary magnetic cloud is supported by several pieces of evidence: good timing, same coronal loop and MC orientation, same magnetic field direction and magnetic helicity sign in the coronal loops and in the MC. We further quantify this link by estimating the magnetic flux (measured in the dimming regions and in the MC) and the magnetic helicity (pre- to post-event change in the solar corona and helicity content of the MC). Within the uncertainties, both magnetic fluxes and helicities are in reasonable agreement, which brings further evidences of their link. These observations show that the ejections of tiny magnetic flux ropes are indeed possible and put new constraints on CME models.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject.classification
Astronomía
dc.subject.classification
Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Interplanetary flux rope ejected from an X-ray bright point: The smallest magnetic cloud source-region ever observed
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-07-25T14:51:24Z
dc.journal.volume
434
dc.journal.number
2
dc.journal.pagination
725-740
dc.journal.pais
Francia
dc.journal.ciudad
Paris
dc.description.fil
Fil: Mandrini, Cristina Hemilse. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil
Fil: Pohjolainen, S.. University of Turku; Turquía
dc.description.fil
Fil: Dasso, Sergio Ricardo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil
Fil: Green, L. M.. Cardiff University; Reino Unido
dc.description.fil
Fil: Démoulin, Pascal. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia
dc.description.fil
Fil: van Driel Gesztelyi, Lidia. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia
dc.description.fil
Fil: Copperwheat, C.. Mullard Space Science Laboratory; Reino Unido
dc.description.fil
Fil: Foley, C.. Mullard Space Science Laboratory; Reino Unido
dc.journal.title
Astronomy and Astrophysics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361:20041079
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2005/17/aa1079/aa1079.html
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