Initiation of CMEs: the role of magnetic twist

Autores
van Driel Gesztelyi, Lidia; Manoharan, P. K.; Démoulin, Pascal; Aulanier, G.; Mandrini, Cristina Hemilse; Lopez Fuentes, Marcelo Claudio; Schmieder, B.; Orlando, S.; Thompson, B.; Plunkett, S. P.
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Recent multiwavelength observations, modelling results and theoretical developments indicate the importance of twisted magnetic configurations in solar active regions (ARs) in the initiation of coronal mass ejections (CMEs). Through multiwavelength analysis of a few representative events we make an attempt to provide constraints for CME models. The two events presented here in detail start with the expansion of sigmoids (S- or inverse S-shaped loops) observed in soft X-rays. Both events (on 25 October 1994 and 14 October 1995) occurred before the launch of the SOHO spacecraft, but indirect evidences (i.e. signatures of an outward propagation traced up to ¡Ö20 solar radii and an associated magnetic cloud) suggest that both of them were related to CMEs. We show evidence that sigmoids are the coronal manifestations of twisted magnetic flux tubes, which start expanding presumably due to a loss of equilibrium. It is noteworthy that the analysed CMEs occurred in a complex (not simply bipolar) magnetic environment and in all cases we found evidences of the interaction (magnetic reconnection) with the surrounding fields. We propose a scenario for sigmoid expansion related CME events and suggest that twisted magnetic configurations are good candidates for being source regions of CMEs.
Fil: van Driel Gesztelyi, Lidia. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia
Fil: Manoharan, P. K.. Tata Institute of Fundamental Researc; India
Fil: Démoulin, Pascal. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia
Fil: Aulanier, G.. University Dr., Fairfax; Estados Unidos
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: Lopez Fuentes, Marcelo Claudio. 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: Schmieder, B.. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia
Fil: Orlando, S.. Istituto Nazionale Di Astrofísica. Osservatorio Astronómico Di Palermo; Italia
Fil: Thompson, B.. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados Unidos
Fil: Plunkett, S. P.. Spece Sciences División. Naval Research Laboratory; Estados Unidos
Materia
Coronal Mass Ejections
Solar Magnetic Fields
Magnetic Twist
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:11336/21021
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/21021
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Initiation of CMEs: the role of magnetic twistvan Driel Gesztelyi, LidiaManoharan, P. K.Démoulin, PascalAulanier, G.Mandrini, Cristina HemilseLopez Fuentes, Marcelo ClaudioSchmieder, B.Orlando, S.Thompson, B.Plunkett, S. P.Coronal Mass EjectionsSolar Magnetic FieldsMagnetic Twisthttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Recent multiwavelength observations, modelling results and theoretical developments indicate the importance of twisted magnetic configurations in solar active regions (ARs) in the initiation of coronal mass ejections (CMEs). Through multiwavelength analysis of a few representative events we make an attempt to provide constraints for CME models. The two events presented here in detail start with the expansion of sigmoids (S- or inverse S-shaped loops) observed in soft X-rays. Both events (on 25 October 1994 and 14 October 1995) occurred before the launch of the SOHO spacecraft, but indirect evidences (i.e. signatures of an outward propagation traced up to ¡Ö20 solar radii and an associated magnetic cloud) suggest that both of them were related to CMEs. We show evidence that sigmoids are the coronal manifestations of twisted magnetic flux tubes, which start expanding presumably due to a loss of equilibrium. It is noteworthy that the analysed CMEs occurred in a complex (not simply bipolar) magnetic environment and in all cases we found evidences of the interaction (magnetic reconnection) with the surrounding fields. We propose a scenario for sigmoid expansion related CME events and suggest that twisted magnetic configurations are good candidates for being source regions of CMEs.Fil: van Driel Gesztelyi, Lidia. Centre National de la Recherche Scientifique. Observatoire de Paris; FranciaFil: Manoharan, P. K.. Tata Institute of Fundamental Researc; IndiaFil: Démoulin, Pascal. Centre National de la Recherche Scientifique. Observatoire de Paris; FranciaFil: Aulanier, G.. University Dr., Fairfax; Estados UnidosFil: 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: Lopez Fuentes, Marcelo Claudio. 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: Schmieder, B.. Centre National de la Recherche Scientifique. Observatoire de Paris; FranciaFil: Orlando, S.. Istituto Nazionale Di Astrofísica. Osservatorio Astronómico Di Palermo; ItaliaFil: Thompson, B.. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados UnidosFil: Plunkett, S. P.. Spece Sciences División. Naval Research Laboratory; Estados UnidosElsevier2000-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/21021van Driel Gesztelyi, Lidia; Manoharan, P. K.; Démoulin, Pascal; Aulanier, G.; Mandrini, Cristina Hemilse; et al.; Initiation of CMEs: the role of magnetic twist; Elsevier; Journal of Atmospheric and Solar-Terrestrial Physics; 62; 16; 11-2000; 1437-14481364-6826CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1364682600000870info:eu-repo/semantics/altIdentifier/doi/10.1016/S1364-6826(00)00087-0info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:23:05Zoai:ri.conicet.gov.ar:11336/21021instacron: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:34982025-10-22 11:23:06.139CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Initiation of CMEs: the role of magnetic twist
title Initiation of CMEs: the role of magnetic twist
spellingShingle Initiation of CMEs: the role of magnetic twist
van Driel Gesztelyi, Lidia
Coronal Mass Ejections
Solar Magnetic Fields
Magnetic Twist
title_short Initiation of CMEs: the role of magnetic twist
title_full Initiation of CMEs: the role of magnetic twist
title_fullStr Initiation of CMEs: the role of magnetic twist
title_full_unstemmed Initiation of CMEs: the role of magnetic twist
title_sort Initiation of CMEs: the role of magnetic twist
dc.creator.none.fl_str_mv van Driel Gesztelyi, Lidia
Manoharan, P. K.
Démoulin, Pascal
Aulanier, G.
Mandrini, Cristina Hemilse
Lopez Fuentes, Marcelo Claudio
Schmieder, B.
Orlando, S.
Thompson, B.
Plunkett, S. P.
author van Driel Gesztelyi, Lidia
author_facet van Driel Gesztelyi, Lidia
Manoharan, P. K.
Démoulin, Pascal
Aulanier, G.
Mandrini, Cristina Hemilse
Lopez Fuentes, Marcelo Claudio
Schmieder, B.
Orlando, S.
Thompson, B.
Plunkett, S. P.
author_role author
author2 Manoharan, P. K.
Démoulin, Pascal
Aulanier, G.
Mandrini, Cristina Hemilse
Lopez Fuentes, Marcelo Claudio
Schmieder, B.
Orlando, S.
Thompson, B.
Plunkett, S. P.
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Coronal Mass Ejections
Solar Magnetic Fields
Magnetic Twist
topic Coronal Mass Ejections
Solar Magnetic Fields
Magnetic Twist
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Recent multiwavelength observations, modelling results and theoretical developments indicate the importance of twisted magnetic configurations in solar active regions (ARs) in the initiation of coronal mass ejections (CMEs). Through multiwavelength analysis of a few representative events we make an attempt to provide constraints for CME models. The two events presented here in detail start with the expansion of sigmoids (S- or inverse S-shaped loops) observed in soft X-rays. Both events (on 25 October 1994 and 14 October 1995) occurred before the launch of the SOHO spacecraft, but indirect evidences (i.e. signatures of an outward propagation traced up to ¡Ö20 solar radii and an associated magnetic cloud) suggest that both of them were related to CMEs. We show evidence that sigmoids are the coronal manifestations of twisted magnetic flux tubes, which start expanding presumably due to a loss of equilibrium. It is noteworthy that the analysed CMEs occurred in a complex (not simply bipolar) magnetic environment and in all cases we found evidences of the interaction (magnetic reconnection) with the surrounding fields. We propose a scenario for sigmoid expansion related CME events and suggest that twisted magnetic configurations are good candidates for being source regions of CMEs.
Fil: van Driel Gesztelyi, Lidia. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia
Fil: Manoharan, P. K.. Tata Institute of Fundamental Researc; India
Fil: Démoulin, Pascal. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia
Fil: Aulanier, G.. University Dr., Fairfax; Estados Unidos
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: Lopez Fuentes, Marcelo Claudio. 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: Schmieder, B.. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia
Fil: Orlando, S.. Istituto Nazionale Di Astrofísica. Osservatorio Astronómico Di Palermo; Italia
Fil: Thompson, B.. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados Unidos
Fil: Plunkett, S. P.. Spece Sciences División. Naval Research Laboratory; Estados Unidos
description Recent multiwavelength observations, modelling results and theoretical developments indicate the importance of twisted magnetic configurations in solar active regions (ARs) in the initiation of coronal mass ejections (CMEs). Through multiwavelength analysis of a few representative events we make an attempt to provide constraints for CME models. The two events presented here in detail start with the expansion of sigmoids (S- or inverse S-shaped loops) observed in soft X-rays. Both events (on 25 October 1994 and 14 October 1995) occurred before the launch of the SOHO spacecraft, but indirect evidences (i.e. signatures of an outward propagation traced up to ¡Ö20 solar radii and an associated magnetic cloud) suggest that both of them were related to CMEs. We show evidence that sigmoids are the coronal manifestations of twisted magnetic flux tubes, which start expanding presumably due to a loss of equilibrium. It is noteworthy that the analysed CMEs occurred in a complex (not simply bipolar) magnetic environment and in all cases we found evidences of the interaction (magnetic reconnection) with the surrounding fields. We propose a scenario for sigmoid expansion related CME events and suggest that twisted magnetic configurations are good candidates for being source regions of CMEs.
publishDate 2000
dc.date.none.fl_str_mv 2000-11
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/11336/21021
van Driel Gesztelyi, Lidia; Manoharan, P. K.; Démoulin, Pascal; Aulanier, G.; Mandrini, Cristina Hemilse; et al.; Initiation of CMEs: the role of magnetic twist; Elsevier; Journal of Atmospheric and Solar-Terrestrial Physics; 62; 16; 11-2000; 1437-1448
1364-6826
CONICET Digital
CONICET
url http://hdl.handle.net/11336/21021
identifier_str_mv van Driel Gesztelyi, Lidia; Manoharan, P. K.; Démoulin, Pascal; Aulanier, G.; Mandrini, Cristina Hemilse; et al.; Initiation of CMEs: the role of magnetic twist; Elsevier; Journal of Atmospheric and Solar-Terrestrial Physics; 62; 16; 11-2000; 1437-1448
1364-6826
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1364682600000870
info:eu-repo/semantics/altIdentifier/doi/10.1016/S1364-6826(00)00087-0
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 Elsevier
publisher.none.fl_str_mv Elsevier
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 12.982451

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