Large scale properties of magnetic clouds: Different approaches to estimate their orientation and impact parameter

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Magnetic clouds are the interplanetary manifestation of solar ejecta that present distinctive properties when compared to the typical solar wind. We study a set of 20 magnetic clouds observed by the Wind spacecraft at 1 AU during a solar minimum. Assuming a cylindrical symmetry for the magnetic stru...

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Detalles Bibliográficos
Autores principales:	Dasso, Sergio Ricardo, Mandrini, Cristina Hemilse
Publicado:	2005
Materias:	Interplanetary medium Magnetic clouds Magnetic helicity Magnetohydrodynamics Solar wind Space physics Solar radiation Spacecraft Magnetic materials
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03796566_v_n592_p621_Galisano http://hdl.handle.net/20.500.12110/paper_03796566_v_n592_p621_Galisano
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_03796566_v_n592_p621_Galisano
record_format	dspace
spelling	paper:paper_03796566_v_n592_p621_Galisano2023-06-08T15:40:44Z Large scale properties of magnetic clouds: Different approaches to estimate their orientation and impact parameter Dasso, Sergio Ricardo Mandrini, Cristina Hemilse Interplanetary medium Magnetic clouds Magnetic helicity Magnetohydrodynamics Solar wind Space physics Magnetohydrodynamics Solar radiation Spacecraft Magnetic helicity Solar wind Space physics Magnetic materials Magnetic clouds are the interplanetary manifestation of solar ejecta that present distinctive properties when compared to the typical solar wind. We study a set of 20 magnetic clouds observed by the Wind spacecraft at 1 AU during a solar minimum. Assuming a cylindrical symmetry for the magnetic structure of the cloud, we estimate their (large scale) magnetic helicity content per unit length. For every cloud we analyze the variation of the computed helicity, using different approaches to determine the orientation of the cloud axis and its minimum distance to the spacecraft (i.e., the impact parameter Y0). We explore different models (force free and non-force free fields) to reconstruct the magnetic structure of the clouds from the observations, which only give information along the (1D) spacecraft trajectory. Estimations of global magnitudes of magnetic clouds are one of the major keys used to link solar and interplanetary events; thus, the results presented here will help to refine the finding of this link from the interplanetary point of view. Fil:Dasso, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mandrini, C.H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03796566_v_n592_p621_Galisano http://hdl.handle.net/20.500.12110/paper_03796566_v_n592_p621_Galisano
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 medium Magnetic clouds Magnetic helicity Magnetohydrodynamics Solar wind Space physics Magnetohydrodynamics Solar radiation Spacecraft Magnetic helicity Solar wind Space physics Magnetic materials
spellingShingle	Interplanetary medium Magnetic clouds Magnetic helicity Magnetohydrodynamics Solar wind Space physics Magnetohydrodynamics Solar radiation Spacecraft Magnetic helicity Solar wind Space physics Magnetic materials Dasso, Sergio Ricardo Mandrini, Cristina Hemilse Large scale properties of magnetic clouds: Different approaches to estimate their orientation and impact parameter
topic_facet	Interplanetary medium Magnetic clouds Magnetic helicity Magnetohydrodynamics Solar wind Space physics Magnetohydrodynamics Solar radiation Spacecraft Magnetic helicity Solar wind Space physics Magnetic materials
description	Magnetic clouds are the interplanetary manifestation of solar ejecta that present distinctive properties when compared to the typical solar wind. We study a set of 20 magnetic clouds observed by the Wind spacecraft at 1 AU during a solar minimum. Assuming a cylindrical symmetry for the magnetic structure of the cloud, we estimate their (large scale) magnetic helicity content per unit length. For every cloud we analyze the variation of the computed helicity, using different approaches to determine the orientation of the cloud axis and its minimum distance to the spacecraft (i.e., the impact parameter Y0). We explore different models (force free and non-force free fields) to reconstruct the magnetic structure of the clouds from the observations, which only give information along the (1D) spacecraft trajectory. Estimations of global magnitudes of magnetic clouds are one of the major keys used to link solar and interplanetary events; thus, the results presented here will help to refine the finding of this link from the interplanetary point of view.
author	Dasso, Sergio Ricardo Mandrini, Cristina Hemilse
author_facet	Dasso, Sergio Ricardo Mandrini, Cristina Hemilse
author_sort	Dasso, Sergio Ricardo
title	Large scale properties of magnetic clouds: Different approaches to estimate their orientation and impact parameter
title_short	Large scale properties of magnetic clouds: Different approaches to estimate their orientation and impact parameter
title_full	Large scale properties of magnetic clouds: Different approaches to estimate their orientation and impact parameter
title_fullStr	Large scale properties of magnetic clouds: Different approaches to estimate their orientation and impact parameter
title_full_unstemmed	Large scale properties of magnetic clouds: Different approaches to estimate their orientation and impact parameter
title_sort	large scale properties of magnetic clouds: different approaches to estimate their orientation and impact parameter
publishDate	2005
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03796566_v_n592_p621_Galisano http://hdl.handle.net/20.500.12110/paper_03796566_v_n592_p621_Galisano
work_keys_str_mv	AT dassosergioricardo largescalepropertiesofmagneticcloudsdifferentapproachestoestimatetheirorientationandimpactparameter AT mandrinicristinahemilse largescalepropertiesofmagneticcloudsdifferentapproachestoestimatetheirorientationandimpactparameter
_version_	1768543612827598848

Large scale properties of magnetic clouds: Different approaches to estimate their orientation and impact parameter

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