A nanoflare based cellular automaton model and the observed properties of the coronal plasma

Autores
Lopez Fuentes, Marcelo Claudio; Klimchuk, James
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We use the cellular automaton model described in López Fuentes & Klimchuk (2015, ApJ, 799, 128) to study the evolution of coronal loop plasmas. The model, based on the idea of a critical misalignment angle in tangled magnetic fields, produces nanoflares of varying frequency with respect to the plasma cooling time. We compare the results of the model with active region (AR) observations obtained with the Hinode/XRT and SDO/AIA instruments. The comparison is based on the statistical properties of synthetic and observed loop lightcurves. Our results show that the model reproduces the main observational characteristics of the evolution of the plasma in AR coronal loops. The typical intensity
fluctuations have an amplitude of 10 to 15% both for the model and the observations. The sign of the skewness of the intensity distributions indicates the presence of cooling plasma in the loops. We also study the emission measure (EM) distribution predicted by the model and obtain slopes in log(EM) versus log(T) between 2.7 and 4.3, in agreement with published observational values.
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: Klimchuk, James. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados Unidos
Materia
Sun: activity
Sun: corona
Sun: magnetic fields
Sun: X-rays
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:11336/18120
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/18120
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A nanoflare based cellular automaton model and the observed properties of the coronal plasmaLopez Fuentes, Marcelo ClaudioKlimchuk, JamesSun: activitySun: coronaSun: magnetic fieldsSun: X-rayshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We use the cellular automaton model described in López Fuentes & Klimchuk (2015, ApJ, 799, 128) to study the evolution of coronal loop plasmas. The model, based on the idea of a critical misalignment angle in tangled magnetic fields, produces nanoflares of varying frequency with respect to the plasma cooling time. We compare the results of the model with active region (AR) observations obtained with the Hinode/XRT and SDO/AIA instruments. The comparison is based on the statistical properties of synthetic and observed loop lightcurves. Our results show that the model reproduces the main observational characteristics of the evolution of the plasma in AR coronal loops. The typical intensity<br />fluctuations have an amplitude of 10 to 15% both for the model and the observations. The sign of the skewness of the intensity distributions indicates the presence of cooling plasma in the loops. We also study the emission measure (EM) distribution predicted by the model and obtain slopes in log(EM) versus log(T) between 2.7 and 4.3, in agreement with published observational values.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; ArgentinaFil: Klimchuk, James. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados UnidosIop Publishing2016-09-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/18120Lopez Fuentes, Marcelo Claudio; Klimchuk, James; A nanoflare based cellular automaton model and the observed properties of the coronal plasma; Iop Publishing; Astrophysical Journal; 828; 2; 7-9-2016; 1-14; 860004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1607.03917info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.3847/0004-637X/828/2/86/metainfo:eu-repo/semantics/altIdentifier/doi/10.3847/0004-637X/828/2/86info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:06:26Zoai:ri.conicet.gov.ar:11336/18120instacron: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 11:06:27.086CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A nanoflare based cellular automaton model and the observed properties of the coronal plasma
title A nanoflare based cellular automaton model and the observed properties of the coronal plasma
spellingShingle A nanoflare based cellular automaton model and the observed properties of the coronal plasma
Lopez Fuentes, Marcelo Claudio
Sun: activity
Sun: corona
Sun: magnetic fields
Sun: X-rays
title_short A nanoflare based cellular automaton model and the observed properties of the coronal plasma
title_full A nanoflare based cellular automaton model and the observed properties of the coronal plasma
title_fullStr A nanoflare based cellular automaton model and the observed properties of the coronal plasma
title_full_unstemmed A nanoflare based cellular automaton model and the observed properties of the coronal plasma
title_sort A nanoflare based cellular automaton model and the observed properties of the coronal plasma
dc.creator.none.fl_str_mv Lopez Fuentes, Marcelo Claudio
Klimchuk, James
author Lopez Fuentes, Marcelo Claudio
author_facet Lopez Fuentes, Marcelo Claudio
Klimchuk, James
author_role author
author2 Klimchuk, James
author2_role author
dc.subject.none.fl_str_mv Sun: activity
Sun: corona
Sun: magnetic fields
Sun: X-rays
topic Sun: activity
Sun: corona
Sun: magnetic fields
Sun: X-rays
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We use the cellular automaton model described in López Fuentes & Klimchuk (2015, ApJ, 799, 128) to study the evolution of coronal loop plasmas. The model, based on the idea of a critical misalignment angle in tangled magnetic fields, produces nanoflares of varying frequency with respect to the plasma cooling time. We compare the results of the model with active region (AR) observations obtained with the Hinode/XRT and SDO/AIA instruments. The comparison is based on the statistical properties of synthetic and observed loop lightcurves. Our results show that the model reproduces the main observational characteristics of the evolution of the plasma in AR coronal loops. The typical intensity<br />fluctuations have an amplitude of 10 to 15% both for the model and the observations. The sign of the skewness of the intensity distributions indicates the presence of cooling plasma in the loops. We also study the emission measure (EM) distribution predicted by the model and obtain slopes in log(EM) versus log(T) between 2.7 and 4.3, in agreement with published observational values.
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: Klimchuk, James. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados Unidos
description We use the cellular automaton model described in López Fuentes & Klimchuk (2015, ApJ, 799, 128) to study the evolution of coronal loop plasmas. The model, based on the idea of a critical misalignment angle in tangled magnetic fields, produces nanoflares of varying frequency with respect to the plasma cooling time. We compare the results of the model with active region (AR) observations obtained with the Hinode/XRT and SDO/AIA instruments. The comparison is based on the statistical properties of synthetic and observed loop lightcurves. Our results show that the model reproduces the main observational characteristics of the evolution of the plasma in AR coronal loops. The typical intensity<br />fluctuations have an amplitude of 10 to 15% both for the model and the observations. The sign of the skewness of the intensity distributions indicates the presence of cooling plasma in the loops. We also study the emission measure (EM) distribution predicted by the model and obtain slopes in log(EM) versus log(T) between 2.7 and 4.3, in agreement with published observational values.
publishDate 2016
dc.date.none.fl_str_mv 2016-09-07
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/11336/18120
Lopez Fuentes, Marcelo Claudio; Klimchuk, James; A nanoflare based cellular automaton model and the observed properties of the coronal plasma; Iop Publishing; Astrophysical Journal; 828; 2; 7-9-2016; 1-14; 86
0004-637X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/18120
identifier_str_mv Lopez Fuentes, Marcelo Claudio; Klimchuk, James; A nanoflare based cellular automaton model and the observed properties of the coronal plasma; Iop Publishing; Astrophysical Journal; 828; 2; 7-9-2016; 1-14; 86
0004-637X
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://arxiv.org/abs/1607.03917
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.3847/0004-637X/828/2/86/meta
info:eu-repo/semantics/altIdentifier/doi/10.3847/0004-637X/828/2/86
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 Iop Publishing
publisher.none.fl_str_mv Iop Publishing
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 12.928904

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