The role of Hall currents on incompressible magnetic reconnection

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Magnetic reconnection is one of the most important energy conversion processes in space plasmas. Theoretical models of magnetic reconnection have been traditionally developed within the framework of magnetohydrodynamics (MHD). However, in low density astrophysical plasmas as those found in the magne...

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Detalles Bibliográficos
Autores principales:	Morales, L.F., Dasso, S., Gómez, D.O., Mininni, P.D.
Formato:	JOUR
Materias:	Hall current Magnetic reconnection Solar wind and magnetosphere Astrophysics Computer simulation Electric field effects Hall effect Magnetohydrodynamics Magnetosphere Mathematical models Plasmas Space applications Hall currents Space plasmas Energy conversion
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_02731177_v37_n7_p1287_Morales
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_02731177_v37_n7_p1287_Morales
record_format	dspace
spelling	todo:paper_02731177_v37_n7_p1287_Morales2023-10-03T15:15:35Z The role of Hall currents on incompressible magnetic reconnection Morales, L.F. Dasso, S. Gómez, D.O. Mininni, P.D. Hall current Magnetic reconnection Solar wind and magnetosphere Astrophysics Computer simulation Electric field effects Hall effect Magnetohydrodynamics Magnetosphere Mathematical models Plasmas Space applications Hall currents Magnetic reconnection Solar wind and magnetosphere Space plasmas Energy conversion Magnetic reconnection is one of the most important energy conversion processes in space plasmas. Theoretical models of magnetic reconnection have been traditionally developed within the framework of magnetohydrodynamics (MHD). However, in low density astrophysical plasmas as those found in the magnetopause and the magnetotail, the current sheet thickness can be comparable to the ion inertial scale and therefore the Hall electric field becomes non-negligible. The role of the Hall current is to increase the reconnection rate with respect to MHD predictions, which therefore poses a promising mechanism for fast reconnection. We present results from parallel simulations of the incompressible Hall MHD equations in 2 frac(1, 2) dimensions. We quantitatively evaluate the relevance of the Hall current in the reconnection process by performing a set of simulations with different values of the Hall parameter. We compute the corresponding reconnection rates as a function of time, and explore the spatial structure of the fields in the surroundings of the diffusion region. We quantify the increase of the reconnection rate as a function of the Hall parameter, and confirm the presence of a quadrupolar structure for the out-of-plane magnetic field. © 2006. Fil:Morales, L.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Dasso, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gómez, D.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mininni, P.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02731177_v37_n7_p1287_Morales
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Hall current Magnetic reconnection Solar wind and magnetosphere Astrophysics Computer simulation Electric field effects Hall effect Magnetohydrodynamics Magnetosphere Mathematical models Plasmas Space applications Hall currents Magnetic reconnection Solar wind and magnetosphere Space plasmas Energy conversion
spellingShingle	Hall current Magnetic reconnection Solar wind and magnetosphere Astrophysics Computer simulation Electric field effects Hall effect Magnetohydrodynamics Magnetosphere Mathematical models Plasmas Space applications Hall currents Magnetic reconnection Solar wind and magnetosphere Space plasmas Energy conversion Morales, L.F. Dasso, S. Gómez, D.O. Mininni, P.D. The role of Hall currents on incompressible magnetic reconnection
topic_facet	Hall current Magnetic reconnection Solar wind and magnetosphere Astrophysics Computer simulation Electric field effects Hall effect Magnetohydrodynamics Magnetosphere Mathematical models Plasmas Space applications Hall currents Magnetic reconnection Solar wind and magnetosphere Space plasmas Energy conversion
description	Magnetic reconnection is one of the most important energy conversion processes in space plasmas. Theoretical models of magnetic reconnection have been traditionally developed within the framework of magnetohydrodynamics (MHD). However, in low density astrophysical plasmas as those found in the magnetopause and the magnetotail, the current sheet thickness can be comparable to the ion inertial scale and therefore the Hall electric field becomes non-negligible. The role of the Hall current is to increase the reconnection rate with respect to MHD predictions, which therefore poses a promising mechanism for fast reconnection. We present results from parallel simulations of the incompressible Hall MHD equations in 2 frac(1, 2) dimensions. We quantitatively evaluate the relevance of the Hall current in the reconnection process by performing a set of simulations with different values of the Hall parameter. We compute the corresponding reconnection rates as a function of time, and explore the spatial structure of the fields in the surroundings of the diffusion region. We quantify the increase of the reconnection rate as a function of the Hall parameter, and confirm the presence of a quadrupolar structure for the out-of-plane magnetic field. © 2006.
format	JOUR
author	Morales, L.F. Dasso, S. Gómez, D.O. Mininni, P.D.
author_facet	Morales, L.F. Dasso, S. Gómez, D.O. Mininni, P.D.
author_sort	Morales, L.F.
title	The role of Hall currents on incompressible magnetic reconnection
title_short	The role of Hall currents on incompressible magnetic reconnection
title_full	The role of Hall currents on incompressible magnetic reconnection
title_fullStr	The role of Hall currents on incompressible magnetic reconnection
title_full_unstemmed	The role of Hall currents on incompressible magnetic reconnection
title_sort	role of hall currents on incompressible magnetic reconnection
url	http://hdl.handle.net/20.500.12110/paper_02731177_v37_n7_p1287_Morales
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_version_	1807321605952503808

The role of Hall currents on incompressible magnetic reconnection

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