The Solar Minimum Corona from Differential Emission Measure Tomography

Autores
Vasquez, Alberto Marcos; Frazin, Richard A.; Manchester IV, Ward B.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present results derived from a dual-spacecraft tomographic reconstruction of the solar corona’s three-dimensional (3D) extreme ultraviolet (EUV) emissivity. We use simultaneously taken STEREO A and B spacecraft EUVI images from Carrington rotation 2077 (2008, November 20 06:56 UT through December 17 14:34 UT). During this period, the spacecraft view-angles were separated by an average 85.4◦ which allowed for the reconstruction to be performed with data gathered in about 3/4 of a full solar rotational time. The EUV reconstructions provide the 3D emissivity in each of the three EUVI Fe bands, in the range of heights 1.00 to 1.25 Rs . We use this information to perform local differential emission measure (LDEM) analysis. Taking moments of the so-derived LDEM distributions gives the 3D values of the electron density, temperature and temperature spread. We determine relationships between the moments of the LDEM and the coronal magnetic field by making longitudinal averages of the moments, and relating them to the global-scale structures of a potential field source surface (PFSS) magnetic field model. In this way, we determine how the electron density, mean temperature, and temperature spread vary for different coronal structures. We draw conclusions about the relationship between the LDEM moments and the sources of the fast and slow solar winds, and the transition between the two regimes.
Fil: Vasquez, Alberto Marcos. 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: Frazin, Richard A.. University of Michigan; Estados Unidos
Fil: Manchester IV, Ward B.. University of Michigan; Estados Unidos
Materia
Sun: Corona
Sun: Magnetic Fields
Sun: Activity
Sun: Solar Wind
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:11336/20257
Acceder
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network_name_str CONICET Digital (CONICET)
spelling The Solar Minimum Corona from Differential Emission Measure TomographyVasquez, Alberto MarcosFrazin, Richard A.Manchester IV, Ward B.Sun: CoronaSun: Magnetic FieldsSun: ActivitySun: Solar Windhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present results derived from a dual-spacecraft tomographic reconstruction of the solar corona’s three-dimensional (3D) extreme ultraviolet (EUV) emissivity. We use simultaneously taken STEREO A and B spacecraft EUVI images from Carrington rotation 2077 (2008, November 20 06:56 UT through December 17 14:34 UT). During this period, the spacecraft view-angles were separated by an average 85.4◦ which allowed for the reconstruction to be performed with data gathered in about 3/4 of a full solar rotational time. The EUV reconstructions provide the 3D emissivity in each of the three EUVI Fe bands, in the range of heights 1.00 to 1.25 Rs . We use this information to perform local differential emission measure (LDEM) analysis. Taking moments of the so-derived LDEM distributions gives the 3D values of the electron density, temperature and temperature spread. We determine relationships between the moments of the LDEM and the coronal magnetic field by making longitudinal averages of the moments, and relating them to the global-scale structures of a potential field source surface (PFSS) magnetic field model. In this way, we determine how the electron density, mean temperature, and temperature spread vary for different coronal structures. We draw conclusions about the relationship between the LDEM moments and the sources of the fast and slow solar winds, and the transition between the two regimes.Fil: Vasquez, Alberto Marcos. 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: Frazin, Richard A.. University of Michigan; Estados UnidosFil: Manchester IV, Ward B.. University of Michigan; Estados UnidosIOP Publishing2010-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/20257Vasquez, Alberto Marcos; Frazin, Richard A.; Manchester IV, Ward B.; The Solar Minimum Corona from Differential Emission Measure Tomography; IOP Publishing; Astrophysical Journal; 715; 2; 6-2010; 1352-13650004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/715/1/1info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-637X/715/2/1352/metainfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:06:19Zoai:ri.conicet.gov.ar:11336/20257instacron: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 10:06:20.102CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The Solar Minimum Corona from Differential Emission Measure Tomography
title The Solar Minimum Corona from Differential Emission Measure Tomography
spellingShingle The Solar Minimum Corona from Differential Emission Measure Tomography
Vasquez, Alberto Marcos
Sun: Corona
Sun: Magnetic Fields
Sun: Activity
Sun: Solar Wind
title_short The Solar Minimum Corona from Differential Emission Measure Tomography
title_full The Solar Minimum Corona from Differential Emission Measure Tomography
title_fullStr The Solar Minimum Corona from Differential Emission Measure Tomography
title_full_unstemmed The Solar Minimum Corona from Differential Emission Measure Tomography
title_sort The Solar Minimum Corona from Differential Emission Measure Tomography
dc.creator.none.fl_str_mv Vasquez, Alberto Marcos
Frazin, Richard A.
Manchester IV, Ward B.
author Vasquez, Alberto Marcos
author_facet Vasquez, Alberto Marcos
Frazin, Richard A.
Manchester IV, Ward B.
author_role author
author2 Frazin, Richard A.
Manchester IV, Ward B.
author2_role author
author
dc.subject.none.fl_str_mv Sun: Corona
Sun: Magnetic Fields
Sun: Activity
Sun: Solar Wind
topic Sun: Corona
Sun: Magnetic Fields
Sun: Activity
Sun: Solar Wind
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 present results derived from a dual-spacecraft tomographic reconstruction of the solar corona’s three-dimensional (3D) extreme ultraviolet (EUV) emissivity. We use simultaneously taken STEREO A and B spacecraft EUVI images from Carrington rotation 2077 (2008, November 20 06:56 UT through December 17 14:34 UT). During this period, the spacecraft view-angles were separated by an average 85.4◦ which allowed for the reconstruction to be performed with data gathered in about 3/4 of a full solar rotational time. The EUV reconstructions provide the 3D emissivity in each of the three EUVI Fe bands, in the range of heights 1.00 to 1.25 Rs . We use this information to perform local differential emission measure (LDEM) analysis. Taking moments of the so-derived LDEM distributions gives the 3D values of the electron density, temperature and temperature spread. We determine relationships between the moments of the LDEM and the coronal magnetic field by making longitudinal averages of the moments, and relating them to the global-scale structures of a potential field source surface (PFSS) magnetic field model. In this way, we determine how the electron density, mean temperature, and temperature spread vary for different coronal structures. We draw conclusions about the relationship between the LDEM moments and the sources of the fast and slow solar winds, and the transition between the two regimes.
Fil: Vasquez, Alberto Marcos. 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: Frazin, Richard A.. University of Michigan; Estados Unidos
Fil: Manchester IV, Ward B.. University of Michigan; Estados Unidos
description We present results derived from a dual-spacecraft tomographic reconstruction of the solar corona’s three-dimensional (3D) extreme ultraviolet (EUV) emissivity. We use simultaneously taken STEREO A and B spacecraft EUVI images from Carrington rotation 2077 (2008, November 20 06:56 UT through December 17 14:34 UT). During this period, the spacecraft view-angles were separated by an average 85.4◦ which allowed for the reconstruction to be performed with data gathered in about 3/4 of a full solar rotational time. The EUV reconstructions provide the 3D emissivity in each of the three EUVI Fe bands, in the range of heights 1.00 to 1.25 Rs . We use this information to perform local differential emission measure (LDEM) analysis. Taking moments of the so-derived LDEM distributions gives the 3D values of the electron density, temperature and temperature spread. We determine relationships between the moments of the LDEM and the coronal magnetic field by making longitudinal averages of the moments, and relating them to the global-scale structures of a potential field source surface (PFSS) magnetic field model. In this way, we determine how the electron density, mean temperature, and temperature spread vary for different coronal structures. We draw conclusions about the relationship between the LDEM moments and the sources of the fast and slow solar winds, and the transition between the two regimes.
publishDate 2010
dc.date.none.fl_str_mv 2010-06
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/11336/20257
Vasquez, Alberto Marcos; Frazin, Richard A.; Manchester IV, Ward B.; The Solar Minimum Corona from Differential Emission Measure Tomography; IOP Publishing; Astrophysical Journal; 715; 2; 6-2010; 1352-1365
0004-637X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/20257
identifier_str_mv Vasquez, Alberto Marcos; Frazin, Richard A.; Manchester IV, Ward B.; The Solar Minimum Corona from Differential Emission Measure Tomography; IOP Publishing; Astrophysical Journal; 715; 2; 6-2010; 1352-1365
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/doi/10.1088/0004-637X/715/1/1
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-637X/715/2/1352/meta
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 13.070432

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