Nonlocal heat transport in the solar wind

It is shown that a nonlocal, suprathermal tail originated near the solar corona base dominates the conductive energy flux at distances r ≥: 2 R ⊙ . A nonlocal analytical expression for the electron heat flux in weakly collisional plasmas is derived by solving the Fokker-Planck equation...

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Autores principales: Canullo, M.V., Costa, A., Ferro-Fontán, C.
Formato: JOUR
Materias:
Solar wind
Sun: corona
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0004637X_v462_n2PARTI_p1005_Canullo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_0004637X_v462_n2PARTI_p1005_Canullo2023-10-03T14:01:39Z Nonlocal heat transport in the solar wind Canullo, M.V. Costa, A. Ferro-Fontán, C. Solar wind Sun: corona It is shown that a nonlocal, suprathermal tail originated near the solar corona base dominates the conductive energy flux at distances r ≥: 2 R ⊙ . A nonlocal analytical expression for the electron heat flux in weakly collisional plasmas is derived by solving the Fokker-Planck equation in a narrow, tail energy range. A correction to the anisotropy of the distribution function due to the divergent magnetic field lines was included. This term is essential to recover from the delocalization prescription, in the limit r ≥ 6 R ⊙ , the well-known Hollweg's Ansatz for the "collisionless" heat flux. In the intermediate region 2 R ȯ r ≤ 6 R ⊙ , the nonlocal convolution smoothly interpolates between the classical Spitzer-Härm's formula and the so-called collisionless régime. © 1996. The American Astronomical Society. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0004637X_v462_n2PARTI_p1005_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 Solar wind
Sun: corona
spellingShingle Solar wind
Sun: corona
Canullo, M.V.
Costa, A.
Ferro-Fontán, C.
Nonlocal heat transport in the solar wind
topic_facet Solar wind
Sun: corona
description It is shown that a nonlocal, suprathermal tail originated near the solar corona base dominates the conductive energy flux at distances r ≥: 2 R ⊙ . A nonlocal analytical expression for the electron heat flux in weakly collisional plasmas is derived by solving the Fokker-Planck equation in a narrow, tail energy range. A correction to the anisotropy of the distribution function due to the divergent magnetic field lines was included. This term is essential to recover from the delocalization prescription, in the limit r ≥ 6 R ⊙ , the well-known Hollweg's Ansatz for the "collisionless" heat flux. In the intermediate region 2 R ȯ r ≤ 6 R ⊙ , the nonlocal convolution smoothly interpolates between the classical Spitzer-Härm's formula and the so-called collisionless régime. © 1996. The American Astronomical Society. All rights reserved.
format JOUR
author Canullo, M.V.
Costa, A.
Ferro-Fontán, C.
author_facet Canullo, M.V.
Costa, A.
Ferro-Fontán, C.
author_sort Canullo, M.V.
title Nonlocal heat transport in the solar wind
title_short Nonlocal heat transport in the solar wind
title_full Nonlocal heat transport in the solar wind
title_fullStr Nonlocal heat transport in the solar wind
title_full_unstemmed Nonlocal heat transport in the solar wind
title_sort nonlocal heat transport in the solar wind
url http://hdl.handle.net/20.500.12110/paper_0004637X_v462_n2PARTI_p1005_Canullo
work_keys_str_mv AT canullomv nonlocalheattransportinthesolarwind
AT costaa nonlocalheattransportinthesolarwind
AT ferrofontanc nonlocalheattransportinthesolarwind
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