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

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 wo...

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Detalles Bibliográficos
Autor principal:	Alexander, Pedro M.
Publicado:	2000
Materias:	Interplanetary physics (discontinuities; MHD waves and turbulence; solar wind plasma)
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09927689_v18_n8_p845_Alexander http://hdl.handle.net/20.500.12110/paper_09927689_v18_n8_p845_Alexander
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_09927689_v18_n8_p845_Alexander
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spelling	paper:paper_09927689_v18_n8_p845_Alexander2023-06-08T15:59:16Z A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU Alexander, Pedro M. Interplanetary physics (discontinuities; MHD waves and turbulence; solar wind plasma) 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, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2000 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09927689_v18_n8_p845_Alexander http://hdl.handle.net/20.500.12110/paper_09927689_v18_n8_p845_Alexander
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Interplanetary physics (discontinuities; MHD waves and turbulence; solar wind plasma)
spellingShingle	Interplanetary physics (discontinuities; MHD waves and turbulence; solar wind plasma) Alexander, Pedro M. A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU
topic_facet	Interplanetary physics (discontinuities; MHD waves and turbulence; solar wind plasma)
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.
author	Alexander, Pedro M.
author_facet	Alexander, Pedro M.
author_sort	Alexander, Pedro M.
title	A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU
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	study of phase-steepened alfvén waves in a high-speed stream at 0.29 au
publishDate	2000
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09927689_v18_n8_p845_Alexander http://hdl.handle.net/20.500.12110/paper_09927689_v18_n8_p845_Alexander
work_keys_str_mv	AT alexanderpedrom astudyofphasesteepenedalfvenwavesinahighspeedstreamat029au AT alexanderpedrom studyofphasesteepenedalfvenwavesinahighspeedstreamat029au
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A study of phase-steepened Alfvén waves in a high-speed stream at 0.29 AU

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