The role of pressure anisotropy in the turbulent intracluster medium

In low-density plasma environments, such as the intracluster medium (ICM), the Larmour frequency is much larger than the ion-ion collision frequency. In such a case, the thermal pressure becomes anisotropic with respect to the magnetic field orientation and the evolution of the turbulent gas is more...

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Detalles Bibliográficos
Autores principales:	Nakwacki, M.S., De Gouveia Dal Pino, E.M., Kowal, G., Santos-Lima, R.
Formato:	CONF
Materias:	Anisotropy Collisionless plasmas Computer hardware description languages Magnetohydrodynamics Fluid-like behavior Intra-cluster medium Ion-ion collision frequency Low-density plasmas Magnetic field orientations Magnetic fluctuation Perpendicular-plane Pressure anisotropy Magnetoplasma
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_17426588_v370_n1_p_Nakwacki
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_17426588_v370_n1_p_Nakwacki
record_format	dspace
spelling	todo:paper_17426588_v370_n1_p_Nakwacki2023-10-03T16:30:44Z The role of pressure anisotropy in the turbulent intracluster medium Nakwacki, M.S. De Gouveia Dal Pino, E.M. Kowal, G. Santos-Lima, R. Anisotropy Collisionless plasmas Computer hardware description languages Magnetohydrodynamics Fluid-like behavior Intra-cluster medium Ion-ion collision frequency Low-density plasmas Magnetic field orientations Magnetic fluctuation Perpendicular-plane Pressure anisotropy Magnetoplasma In low-density plasma environments, such as the intracluster medium (ICM), the Larmour frequency is much larger than the ion-ion collision frequency. In such a case, the thermal pressure becomes anisotropic with respect to the magnetic field orientation and the evolution of the turbulent gas is more correctly described by a kinetic approach. A possible description of these collisionless scenarios is given by the so-called kinetic magnetohydrodynamic (KMHD) formalism, in which particles freely stream along the field lines, while moving with the field lines in the perpendicular direction. In this way a fluid-like behavior in the perpendicular plane is restored. In this work, we study fast growing magnetic fluctuations in the smallest scales which operate in the collisionless plasma that fills the ICM. In particular, we focus on the impact of a particular evolution of the pressure anisotropy and its implications for the turbulent dynamics of observables under the conditions prevailing in the ICM. We present results from numerical simulations and compare the results which those obtained using an MHD formalism. CONF info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_17426588_v370_n1_p_Nakwacki
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Anisotropy Collisionless plasmas Computer hardware description languages Magnetohydrodynamics Fluid-like behavior Intra-cluster medium Ion-ion collision frequency Low-density plasmas Magnetic field orientations Magnetic fluctuation Perpendicular-plane Pressure anisotropy Magnetoplasma
spellingShingle	Anisotropy Collisionless plasmas Computer hardware description languages Magnetohydrodynamics Fluid-like behavior Intra-cluster medium Ion-ion collision frequency Low-density plasmas Magnetic field orientations Magnetic fluctuation Perpendicular-plane Pressure anisotropy Magnetoplasma Nakwacki, M.S. De Gouveia Dal Pino, E.M. Kowal, G. Santos-Lima, R. The role of pressure anisotropy in the turbulent intracluster medium
topic_facet	Anisotropy Collisionless plasmas Computer hardware description languages Magnetohydrodynamics Fluid-like behavior Intra-cluster medium Ion-ion collision frequency Low-density plasmas Magnetic field orientations Magnetic fluctuation Perpendicular-plane Pressure anisotropy Magnetoplasma
description	In low-density plasma environments, such as the intracluster medium (ICM), the Larmour frequency is much larger than the ion-ion collision frequency. In such a case, the thermal pressure becomes anisotropic with respect to the magnetic field orientation and the evolution of the turbulent gas is more correctly described by a kinetic approach. A possible description of these collisionless scenarios is given by the so-called kinetic magnetohydrodynamic (KMHD) formalism, in which particles freely stream along the field lines, while moving with the field lines in the perpendicular direction. In this way a fluid-like behavior in the perpendicular plane is restored. In this work, we study fast growing magnetic fluctuations in the smallest scales which operate in the collisionless plasma that fills the ICM. In particular, we focus on the impact of a particular evolution of the pressure anisotropy and its implications for the turbulent dynamics of observables under the conditions prevailing in the ICM. We present results from numerical simulations and compare the results which those obtained using an MHD formalism.
format	CONF
author	Nakwacki, M.S. De Gouveia Dal Pino, E.M. Kowal, G. Santos-Lima, R.
author_facet	Nakwacki, M.S. De Gouveia Dal Pino, E.M. Kowal, G. Santos-Lima, R.
author_sort	Nakwacki, M.S.
title	The role of pressure anisotropy in the turbulent intracluster medium
title_short	The role of pressure anisotropy in the turbulent intracluster medium
title_full	The role of pressure anisotropy in the turbulent intracluster medium
title_fullStr	The role of pressure anisotropy in the turbulent intracluster medium
title_full_unstemmed	The role of pressure anisotropy in the turbulent intracluster medium
title_sort	role of pressure anisotropy in the turbulent intracluster medium
url	http://hdl.handle.net/20.500.12110/paper_17426588_v370_n1_p_Nakwacki
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The role of pressure anisotropy in the turbulent intracluster medium

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