How Can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud?

Autores
Chandra, R.; Pariat, E.; Schmieder, B.; Mandrini, Cristina Hemilse; Uddin, W.
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The geoeffective magnetic cloud (MC) of 20 November 2003 was associated with the 18 November 2003 solar active events in previous studies. In some of these, it was estimated that the magnetic helicity carried by the MC had a positive sign, as did its solar source, active region (AR) NOAA 10501. In this article we show that the large-scale magnetic field of AR 10501 has a negative helicity sign. Since coronal mass ejections (CMEs) are one of the means by which the Sun ejects magnetic helicity excess into interplanetary space, the signs of magnetic helicity in the AR and MC must agree. Therefore, this finding contradicts what is expected from magnetic helicity conservation. However, using, for the first time, correct helicity density maps to determine the spatial distribution of magnetic helicity injections, we show the existence of a localized flux of positive helicity in the southern part of AR 10501. We conclude that positive helicity was ejected from this portion of the AR leading to the observed positive helicity MC.
Fil: Chandra, R.. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia
Fil: Pariat, E.. Space Weather Laboratory; Estados Unidos
Fil: Schmieder, B.. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia
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
Fil: Uddin, W.. Aryabhatta Research Institute of Observational Sciences; India
Materia
Active Regions
Magnetic Fields
Coronal Mass Ejections; Interplanetary
Flares Dynamics
Magnetic Helicity
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/19157
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling How Can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud?Chandra, R.Pariat, E.Schmieder, B.Mandrini, Cristina HemilseUddin, W.Active RegionsMagnetic FieldsCoronal Mass Ejections; InterplanetaryFlares DynamicsMagnetic Helicityhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The geoeffective magnetic cloud (MC) of 20 November 2003 was associated with the 18 November 2003 solar active events in previous studies. In some of these, it was estimated that the magnetic helicity carried by the MC had a positive sign, as did its solar source, active region (AR) NOAA 10501. In this article we show that the large-scale magnetic field of AR 10501 has a negative helicity sign. Since coronal mass ejections (CMEs) are one of the means by which the Sun ejects magnetic helicity excess into interplanetary space, the signs of magnetic helicity in the AR and MC must agree. Therefore, this finding contradicts what is expected from magnetic helicity conservation. However, using, for the first time, correct helicity density maps to determine the spatial distribution of magnetic helicity injections, we show the existence of a localized flux of positive helicity in the southern part of AR 10501. We conclude that positive helicity was ejected from this portion of the AR leading to the observed positive helicity MC.Fil: Chandra, R.. Centre National de la Recherche Scientifique. Observatoire de Paris; FranciaFil: Pariat, E.. Space Weather Laboratory; Estados UnidosFil: Schmieder, B.. Centre National de la Recherche Scientifique. Observatoire de Paris; FranciaFil: 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; ArgentinaFil: Uddin, W.. Aryabhatta Research Institute of Observational Sciences; IndiaSpringer2009-11-13info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/19157Chandra, R.; Pariat, E.; Schmieder, B.; Mandrini, Cristina Hemilse; Uddin, W.; How Can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud?; Springer; Solar Physics; 261; 1; 13-11-2009; 127-1480038-0938CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s11207-009-9470-2info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/0910.0968info:eu-repo/semantics/altIdentifier/doi/10.1007/s11207-009-9470-2info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:24:07Zoai:ri.conicet.gov.ar:11336/19157instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-10 13:24:07.516CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv How Can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud?
title How Can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud?
spellingShingle How Can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud?
Chandra, R.
Active Regions
Magnetic Fields
Coronal Mass Ejections; Interplanetary
Flares Dynamics
Magnetic Helicity
title_short How Can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud?
title_full How Can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud?
title_fullStr How Can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud?
title_full_unstemmed How Can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud?
title_sort How Can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud?
dc.creator.none.fl_str_mv Chandra, R.
Pariat, E.
Schmieder, B.
Mandrini, Cristina Hemilse
Uddin, W.
author Chandra, R.
author_facet Chandra, R.
Pariat, E.
Schmieder, B.
Mandrini, Cristina Hemilse
Uddin, W.
author_role author
author2 Pariat, E.
Schmieder, B.
Mandrini, Cristina Hemilse
Uddin, W.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Active Regions
Magnetic Fields
Coronal Mass Ejections; Interplanetary
Flares Dynamics
Magnetic Helicity
topic Active Regions
Magnetic Fields
Coronal Mass Ejections; Interplanetary
Flares Dynamics
Magnetic Helicity
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The geoeffective magnetic cloud (MC) of 20 November 2003 was associated with the 18 November 2003 solar active events in previous studies. In some of these, it was estimated that the magnetic helicity carried by the MC had a positive sign, as did its solar source, active region (AR) NOAA 10501. In this article we show that the large-scale magnetic field of AR 10501 has a negative helicity sign. Since coronal mass ejections (CMEs) are one of the means by which the Sun ejects magnetic helicity excess into interplanetary space, the signs of magnetic helicity in the AR and MC must agree. Therefore, this finding contradicts what is expected from magnetic helicity conservation. However, using, for the first time, correct helicity density maps to determine the spatial distribution of magnetic helicity injections, we show the existence of a localized flux of positive helicity in the southern part of AR 10501. We conclude that positive helicity was ejected from this portion of the AR leading to the observed positive helicity MC.
Fil: Chandra, R.. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia
Fil: Pariat, E.. Space Weather Laboratory; Estados Unidos
Fil: Schmieder, B.. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia
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
Fil: Uddin, W.. Aryabhatta Research Institute of Observational Sciences; India
description The geoeffective magnetic cloud (MC) of 20 November 2003 was associated with the 18 November 2003 solar active events in previous studies. In some of these, it was estimated that the magnetic helicity carried by the MC had a positive sign, as did its solar source, active region (AR) NOAA 10501. In this article we show that the large-scale magnetic field of AR 10501 has a negative helicity sign. Since coronal mass ejections (CMEs) are one of the means by which the Sun ejects magnetic helicity excess into interplanetary space, the signs of magnetic helicity in the AR and MC must agree. Therefore, this finding contradicts what is expected from magnetic helicity conservation. However, using, for the first time, correct helicity density maps to determine the spatial distribution of magnetic helicity injections, we show the existence of a localized flux of positive helicity in the southern part of AR 10501. We conclude that positive helicity was ejected from this portion of the AR leading to the observed positive helicity MC.
publishDate 2009
dc.date.none.fl_str_mv 2009-11-13
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/19157
Chandra, R.; Pariat, E.; Schmieder, B.; Mandrini, Cristina Hemilse; Uddin, W.; How Can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud?; Springer; Solar Physics; 261; 1; 13-11-2009; 127-148
0038-0938
CONICET Digital
CONICET
url http://hdl.handle.net/11336/19157
identifier_str_mv Chandra, R.; Pariat, E.; Schmieder, B.; Mandrini, Cristina Hemilse; Uddin, W.; How Can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud?; Springer; Solar Physics; 261; 1; 13-11-2009; 127-148
0038-0938
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s11207-009-9470-2
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/0910.0968
info:eu-repo/semantics/altIdentifier/doi/10.1007/s11207-009-9470-2
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.48226

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