A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU

Autores
Alexander, Pedro Manfredo
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This work performs a search of phase-steepened Alfvén waves under a priori ideal conditions: a high-speed solar wind stream observed in one of the closest approaches to the Sun by any spacecraft (Helios 2). Five potential candidates were initially found following procedures established in earlier work. The observed cases exhibited arc-like or elliptical polarizations, and the rotational discontinuities that formed the abrupt wave edges were found at either the leading or the trailing part. The consideration of some additional specific parameters (mainly related to the relative orientation between mean magnetic field, wave and discontinuity) has been suggested here for an ultimate and proper identification of this kind of phenomenon. After the inclusion of these calculations in our analysis, even fewer cases than the five originals remain. It is suggested that optimum conditions for the detection rather than just for the existence of these events have to be reconsidered.
Fil: Alexander, Pedro Manfredo. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
Materia
INTERPLANETARY PHYSICS (DISCONTINUITIES; MHD WAVES AND TURBULENCE; SOLAR WIND PLASMA)
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:11336/54784
Acceder
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network_name_str CONICET Digital (CONICET)
spelling A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AUAlexander, Pedro ManfredoINTERPLANETARY PHYSICS (DISCONTINUITIES; MHD WAVES AND TURBULENCE; SOLAR WIND PLASMA)https://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1This work performs a search of phase-steepened Alfvén waves under a priori ideal conditions: a high-speed solar wind stream observed in one of the closest approaches to the Sun by any spacecraft (Helios 2). Five potential candidates were initially found following procedures established in earlier work. The observed cases exhibited arc-like or elliptical polarizations, and the rotational discontinuities that formed the abrupt wave edges were found at either the leading or the trailing part. The consideration of some additional specific parameters (mainly related to the relative orientation between mean magnetic field, wave and discontinuity) has been suggested here for an ultimate and proper identification of this kind of phenomenon. After the inclusion of these calculations in our analysis, even fewer cases than the five originals remain. It is suggested that optimum conditions for the detection rather than just for the existence of these events have to be reconsidered.Fil: Alexander, Pedro Manfredo. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaCopernicus Publications2000-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/54784Alexander, Pedro Manfredo; A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU; Copernicus Publications; Annales Geophysicae; 18; 8; 8-2000; 845-8511432-0576CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.ann-geophys.net/18/845/2000/info:eu-repo/semantics/altIdentifier/doi/10.1007/s00585-000-0845-9info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:27:59Zoai:ri.conicet.gov.ar:11336/54784instacron: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:34982025-10-15 15:27:59.439CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU
title A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU
spellingShingle A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU
Alexander, Pedro Manfredo
INTERPLANETARY PHYSICS (DISCONTINUITIES; MHD WAVES AND TURBULENCE; SOLAR WIND PLASMA)
title_short A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU
title_full A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU
title_fullStr A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU
title_full_unstemmed A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU
title_sort A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU
dc.creator.none.fl_str_mv Alexander, Pedro Manfredo
author Alexander, Pedro Manfredo
author_facet Alexander, Pedro Manfredo
author_role author
dc.subject.none.fl_str_mv INTERPLANETARY PHYSICS (DISCONTINUITIES; MHD WAVES AND TURBULENCE; SOLAR WIND PLASMA)
topic INTERPLANETARY PHYSICS (DISCONTINUITIES; MHD WAVES AND TURBULENCE; SOLAR WIND PLASMA)
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv This work performs a search of phase-steepened Alfvén waves under a priori ideal conditions: a high-speed solar wind stream observed in one of the closest approaches to the Sun by any spacecraft (Helios 2). Five potential candidates were initially found following procedures established in earlier work. The observed cases exhibited arc-like or elliptical polarizations, and the rotational discontinuities that formed the abrupt wave edges were found at either the leading or the trailing part. The consideration of some additional specific parameters (mainly related to the relative orientation between mean magnetic field, wave and discontinuity) has been suggested here for an ultimate and proper identification of this kind of phenomenon. After the inclusion of these calculations in our analysis, even fewer cases than the five originals remain. It is suggested that optimum conditions for the detection rather than just for the existence of these events have to be reconsidered.
Fil: Alexander, Pedro Manfredo. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
description This work performs a search of phase-steepened Alfvén waves under a priori ideal conditions: a high-speed solar wind stream observed in one of the closest approaches to the Sun by any spacecraft (Helios 2). Five potential candidates were initially found following procedures established in earlier work. The observed cases exhibited arc-like or elliptical polarizations, and the rotational discontinuities that formed the abrupt wave edges were found at either the leading or the trailing part. The consideration of some additional specific parameters (mainly related to the relative orientation between mean magnetic field, wave and discontinuity) has been suggested here for an ultimate and proper identification of this kind of phenomenon. After the inclusion of these calculations in our analysis, even fewer cases than the five originals remain. It is suggested that optimum conditions for the detection rather than just for the existence of these events have to be reconsidered.
publishDate 2000
dc.date.none.fl_str_mv 2000-08
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/11336/54784
Alexander, Pedro Manfredo; A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU; Copernicus Publications; Annales Geophysicae; 18; 8; 8-2000; 845-851
1432-0576
CONICET Digital
CONICET
url http://hdl.handle.net/11336/54784
identifier_str_mv Alexander, Pedro Manfredo; A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU; Copernicus Publications; Annales Geophysicae; 18; 8; 8-2000; 845-851
1432-0576
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.ann-geophys.net/18/845/2000/
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00585-000-0845-9
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 Copernicus Publications
publisher.none.fl_str_mv Copernicus Publications
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 13.22299

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