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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/21021
Ver los metadatos del registro completo
id |
CONICETDig_c10e3878a477f5889d7e618a4f5504b9 |
---|---|
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 Técnicas2025-09-29T09:53:47Zoai: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:34982025-09-29 09:53:48.111CONICET 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 |
_version_ |
1844613639737180160 |
score |
13.070432 |