Kelvin-Helmholtz multi-spacecraft studies at the Earth's magnetopause boundaries

The Kelvin-Helmholtz (KH) instability can operate in various situations in the solar wind, but at the boundaries of planetary obstacles, for example the Earth's magnetopause, it is most amenable to investigation. Reliable estimates of wave characteristics are essential for comparison with theor...

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Autores principales: Foullon, C., Farrugia, C.J., Owen, C.J., Fazakerley, A.N., Gratton, F.T.
Formato: CONF
Materias:
Magnetopause and boundary layers
MHD waves and instabilities
Solar wind/magnetosphere interactions
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0094243X_v1216_n_p483_Foullon
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_0094243X_v1216_n_p483_Foullon
record_format dspace
spelling todo:paper_0094243X_v1216_n_p483_Foullon2023-10-03T14:56:00Z Kelvin-Helmholtz multi-spacecraft studies at the Earth's magnetopause boundaries Foullon, C. Farrugia, C.J. Owen, C.J. Fazakerley, A.N. Gratton, F.T. Magnetopause and boundary layers MHD waves and instabilities Solar wind/magnetosphere interactions The Kelvin-Helmholtz (KH) instability can operate in various situations in the solar wind, but at the boundaries of planetary obstacles, for example the Earth's magnetopause, it is most amenable to investigation. Reliable estimates of wave characteristics are essential for comparison with theoretical and numerical models and for understanding the nonlinear development of KH waves and their role in the plasma entry into the magnetosphere. After discussing their typical conditions of appearance in KH unstable domains at the magnetopause, both theoretically and observationally, we outline recent results of multi-spacecraft analysis with Cluster giving accurate, albeit spatially limited, determination of surface wave characteristics. Those characteristics (wavelength and propagation direction), close to the terminator on the nightside, are likely to be prescribed by the 3-D geometry and the bending of field lines developed by the KH waves, rather than by the magnitude and the direction of the magnetosheath or background flow. An unprecedented number of satellites provides now the opportunity to extend the analysis of source regions of KH waves and their domains of development. © 2010 American Institute of Physics. CONF info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0094243X_v1216_n_p483_Foullon
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Magnetopause and boundary layers
MHD waves and instabilities
Solar wind/magnetosphere interactions
spellingShingle Magnetopause and boundary layers
MHD waves and instabilities
Solar wind/magnetosphere interactions
Foullon, C.
Farrugia, C.J.
Owen, C.J.
Fazakerley, A.N.
Gratton, F.T.
Kelvin-Helmholtz multi-spacecraft studies at the Earth's magnetopause boundaries
topic_facet Magnetopause and boundary layers
MHD waves and instabilities
Solar wind/magnetosphere interactions
description The Kelvin-Helmholtz (KH) instability can operate in various situations in the solar wind, but at the boundaries of planetary obstacles, for example the Earth's magnetopause, it is most amenable to investigation. Reliable estimates of wave characteristics are essential for comparison with theoretical and numerical models and for understanding the nonlinear development of KH waves and their role in the plasma entry into the magnetosphere. After discussing their typical conditions of appearance in KH unstable domains at the magnetopause, both theoretically and observationally, we outline recent results of multi-spacecraft analysis with Cluster giving accurate, albeit spatially limited, determination of surface wave characteristics. Those characteristics (wavelength and propagation direction), close to the terminator on the nightside, are likely to be prescribed by the 3-D geometry and the bending of field lines developed by the KH waves, rather than by the magnitude and the direction of the magnetosheath or background flow. An unprecedented number of satellites provides now the opportunity to extend the analysis of source regions of KH waves and their domains of development. © 2010 American Institute of Physics.
format CONF
author Foullon, C.
Farrugia, C.J.
Owen, C.J.
Fazakerley, A.N.
Gratton, F.T.
author_facet Foullon, C.
Farrugia, C.J.
Owen, C.J.
Fazakerley, A.N.
Gratton, F.T.
author_sort Foullon, C.
title Kelvin-Helmholtz multi-spacecraft studies at the Earth's magnetopause boundaries
title_short Kelvin-Helmholtz multi-spacecraft studies at the Earth's magnetopause boundaries
title_full Kelvin-Helmholtz multi-spacecraft studies at the Earth's magnetopause boundaries
title_fullStr Kelvin-Helmholtz multi-spacecraft studies at the Earth's magnetopause boundaries
title_full_unstemmed Kelvin-Helmholtz multi-spacecraft studies at the Earth's magnetopause boundaries
title_sort kelvin-helmholtz multi-spacecraft studies at the earth's magnetopause boundaries
url http://hdl.handle.net/20.500.12110/paper_0094243X_v1216_n_p483_Foullon
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AT owencj kelvinhelmholtzmultispacecraftstudiesattheearthsmagnetopauseboundaries
AT fazakerleyan kelvinhelmholtzmultispacecraftstudiesattheearthsmagnetopauseboundaries
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