Stability and mode analysis of solar coronal loops using thermodynamic irreversible energy principles

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Aims. We study the modes and stability of non-isothermal coronal loop models with different intensity values of the equilibrium magnetic field. Methods. We use an energy principle obtained via non-equilibrium thermodynamic arguments. The principle is expressed in terms of Hermitian operators and all...

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Autores principales: Costa, A., González, R.
Formato: JOUR
Materias:
Standards
Sun: corona
Waves
Continuous spectrum
Corona
Solar coronal loops
Thermodynamic irreversible energy principles
Magnetic fields
Mathematical models
Mathematical operators
Spectrum analysis
System stability
Thermodynamics
Solar radiation
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00046361_v458_n3_p953_Costa
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00046361_v458_n3_p953_Costa
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spelling todo:paper_00046361_v458_n3_p953_Costa2023-10-03T14:00:17Z Stability and mode analysis of solar coronal loops using thermodynamic irreversible energy principles Costa, A. González, R. Standards Sun: corona Waves Continuous spectrum Corona Solar coronal loops Thermodynamic irreversible energy principles Magnetic fields Mathematical models Mathematical operators Spectrum analysis System stability Thermodynamics Solar radiation Aims. We study the modes and stability of non-isothermal coronal loop models with different intensity values of the equilibrium magnetic field. Methods. We use an energy principle obtained via non-equilibrium thermodynamic arguments. The principle is expressed in terms of Hermitian operators and allow to consider together the coupled system of equations: the balance of energy equation and the equation of motion. Results. We determine modes characterized as long - wavelength disturbances that are present in inhomogeneous media. This character of the system introduces additional difficulties for the stability analysis because the inhomogeneous nature of the medium determines the structure of the disturbance, which is no longer sinusoidal. Moreover, another complication is that we obtain a continuous spectrum of stable modes in addition to the discrete one. Conclusions. We obtain a unique unstable mode with a characteristic time that is comparable with the characteristic life-time observed for loops. The feasibility of wave-based and flow-based models is examined. © ESO 2006. Fil:González, R. 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_00046361_v458_n3_p953_Costa
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Standards
Sun: corona
Waves
Continuous spectrum
Corona
Solar coronal loops
Thermodynamic irreversible energy principles
Magnetic fields
Mathematical models
Mathematical operators
Spectrum analysis
System stability
Thermodynamics
Solar radiation
spellingShingle Standards
Sun: corona
Waves
Continuous spectrum
Corona
Solar coronal loops
Thermodynamic irreversible energy principles
Magnetic fields
Mathematical models
Mathematical operators
Spectrum analysis
System stability
Thermodynamics
Solar radiation
Costa, A.
González, R.
Stability and mode analysis of solar coronal loops using thermodynamic irreversible energy principles
topic_facet Standards
Sun: corona
Waves
Continuous spectrum
Corona
Solar coronal loops
Thermodynamic irreversible energy principles
Magnetic fields
Mathematical models
Mathematical operators
Spectrum analysis
System stability
Thermodynamics
Solar radiation
description Aims. We study the modes and stability of non-isothermal coronal loop models with different intensity values of the equilibrium magnetic field. Methods. We use an energy principle obtained via non-equilibrium thermodynamic arguments. The principle is expressed in terms of Hermitian operators and allow to consider together the coupled system of equations: the balance of energy equation and the equation of motion. Results. We determine modes characterized as long - wavelength disturbances that are present in inhomogeneous media. This character of the system introduces additional difficulties for the stability analysis because the inhomogeneous nature of the medium determines the structure of the disturbance, which is no longer sinusoidal. Moreover, another complication is that we obtain a continuous spectrum of stable modes in addition to the discrete one. Conclusions. We obtain a unique unstable mode with a characteristic time that is comparable with the characteristic life-time observed for loops. The feasibility of wave-based and flow-based models is examined. © ESO 2006.
format JOUR
author Costa, A.
González, R.
author_facet Costa, A.
González, R.
author_sort Costa, A.
title Stability and mode analysis of solar coronal loops using thermodynamic irreversible energy principles
title_short Stability and mode analysis of solar coronal loops using thermodynamic irreversible energy principles
title_full Stability and mode analysis of solar coronal loops using thermodynamic irreversible energy principles
title_fullStr Stability and mode analysis of solar coronal loops using thermodynamic irreversible energy principles
title_full_unstemmed Stability and mode analysis of solar coronal loops using thermodynamic irreversible energy principles
title_sort stability and mode analysis of solar coronal loops using thermodynamic irreversible energy principles
url http://hdl.handle.net/20.500.12110/paper_00046361_v458_n3_p953_Costa
work_keys_str_mv AT costaa stabilityandmodeanalysisofsolarcoronalloopsusingthermodynamicirreversibleenergyprinciples
AT gonzalezr stabilityandmodeanalysisofsolarcoronalloopsusingthermodynamicirreversibleenergyprinciples
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