Coronal heating by selective decay of MHD turbulence

We suggest that the solar corona is stationarily heated by Joule dissipation of magnetohydrodynamic (MHD) turbulence. This turbulence is continuously being fed by subphotospheric convective motions at very low wavenumbers where the plasma can be considered ideal. The cascade process due to the nonli...

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Autores principales: Gómez, D., Fontán, C.F.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00380938_v116_n1_p33_Gomez
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00380938_v116_n1_p33_Gomez2023-10-03T14:48:24Z Coronal heating by selective decay of MHD turbulence Gómez, D. Fontán, C.F. We suggest that the solar corona is stationarily heated by Joule dissipation of magnetohydrodynamic (MHD) turbulence. This turbulence is continuously being fed by subphotospheric convective motions at very low wavenumbers where the plasma can be considered ideal. The cascade process due to the nonlinear interaction of the turbulent modes, effectively transfers energy to even shorter wavenumbers until Joule effect becomes dominant and converts the cascading magnetic energy into heat. Assuming that a stationary spectrum is established, we show that MHD turbulence naturally provides a way of enhancing the Joule dissipation of macroscopic magnetic stresses and a heating rate can be derived. © 1988 Kluwer Academic Publishers. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00380938_v116_n1_p33_Gomez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We suggest that the solar corona is stationarily heated by Joule dissipation of magnetohydrodynamic (MHD) turbulence. This turbulence is continuously being fed by subphotospheric convective motions at very low wavenumbers where the plasma can be considered ideal. The cascade process due to the nonlinear interaction of the turbulent modes, effectively transfers energy to even shorter wavenumbers until Joule effect becomes dominant and converts the cascading magnetic energy into heat. Assuming that a stationary spectrum is established, we show that MHD turbulence naturally provides a way of enhancing the Joule dissipation of macroscopic magnetic stresses and a heating rate can be derived. © 1988 Kluwer Academic Publishers.
format JOUR
author Gómez, D.
Fontán, C.F.
spellingShingle Gómez, D.
Fontán, C.F.
Coronal heating by selective decay of MHD turbulence
author_facet Gómez, D.
Fontán, C.F.
author_sort Gómez, D.
title Coronal heating by selective decay of MHD turbulence
title_short Coronal heating by selective decay of MHD turbulence
title_full Coronal heating by selective decay of MHD turbulence
title_fullStr Coronal heating by selective decay of MHD turbulence
title_full_unstemmed Coronal heating by selective decay of MHD turbulence
title_sort coronal heating by selective decay of mhd turbulence
url http://hdl.handle.net/20.500.12110/paper_00380938_v116_n1_p33_Gomez
work_keys_str_mv AT gomezd coronalheatingbyselectivedecayofmhdturbulence
AT fontancf coronalheatingbyselectivedecayofmhdturbulence
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