Langmuir instabilities in the solar wind plasma

The development of the anisotropy of the electron distribution function in the lower solar corona has been studied through a test-particle model, revealing that particles with ν∥ > 5re will eventually run away owing to the magnetic pumping effect. The scaling with ν∥ of the parallel distribut...

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Autores principales: Canullo, M.V., Hasi, C.D.E.L.
Formato: JOUR
Materias:
Instabilities
Plasmas
Solar wind
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0004637X_v461_n1PARTI_p472_Canullo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_0004637X_v461_n1PARTI_p472_Canullo
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spelling todo:paper_0004637X_v461_n1PARTI_p472_Canullo2023-10-03T14:01:39Z Langmuir instabilities in the solar wind plasma Canullo, M.V. Hasi, C.D.E.L. Instabilities Plasmas Solar wind The development of the anisotropy of the electron distribution function in the lower solar corona has been studied through a test-particle model, revealing that particles with ν∥ > 5re will eventually run away owing to the magnetic pumping effect. The scaling with ν∥ of the parallel distribution function and of the perpendicular temperature is also derived. The theory shows a suprathermal tail originated near the coronal base that dominates the energy flux at distances r ≃ 4 Ṙ. We analyze the high-frequency instability produced by the small anisotropy in perpendicular energy of the runaway electron distribution in the magnetized plasma of the solar wind. A phenomenological description of this instability is obtained. It is also reported that the stability behavior is uncorrelated with the perpendicular temperature profile. The efficiency of Langmuir oscillations as a heating mechanism for the solar wind is discussed. © 1996. The American Astronomical Society. All rights reserved. Fil:Canullo, M.V. 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_0004637X_v461_n1PARTI_p472_Canullo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Instabilities
Plasmas
Solar wind
spellingShingle Instabilities
Plasmas
Solar wind
Canullo, M.V.
Hasi, C.D.E.L.
Langmuir instabilities in the solar wind plasma
topic_facet Instabilities
Plasmas
Solar wind
description The development of the anisotropy of the electron distribution function in the lower solar corona has been studied through a test-particle model, revealing that particles with ν∥ > 5re will eventually run away owing to the magnetic pumping effect. The scaling with ν∥ of the parallel distribution function and of the perpendicular temperature is also derived. The theory shows a suprathermal tail originated near the coronal base that dominates the energy flux at distances r ≃ 4 Ṙ. We analyze the high-frequency instability produced by the small anisotropy in perpendicular energy of the runaway electron distribution in the magnetized plasma of the solar wind. A phenomenological description of this instability is obtained. It is also reported that the stability behavior is uncorrelated with the perpendicular temperature profile. The efficiency of Langmuir oscillations as a heating mechanism for the solar wind is discussed. © 1996. The American Astronomical Society. All rights reserved.
format JOUR
author Canullo, M.V.
Hasi, C.D.E.L.
author_facet Canullo, M.V.
Hasi, C.D.E.L.
author_sort Canullo, M.V.
title Langmuir instabilities in the solar wind plasma
title_short Langmuir instabilities in the solar wind plasma
title_full Langmuir instabilities in the solar wind plasma
title_fullStr Langmuir instabilities in the solar wind plasma
title_full_unstemmed Langmuir instabilities in the solar wind plasma
title_sort langmuir instabilities in the solar wind plasma
url http://hdl.handle.net/20.500.12110/paper_0004637X_v461_n1PARTI_p472_Canullo
work_keys_str_mv AT canullomv langmuirinstabilitiesinthesolarwindplasma
AT hasicdel langmuirinstabilitiesinthesolarwindplasma
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