Heating of coronal active regions

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Recent observations of coronal loops in solar active regions show that their heating must be a truly dynamic process. Even though it seems clear that the energy source is the magnetic field that confines the coronal plasma, the details of how it dissipates are still a matter of debate. In this prese...

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Autor principal:	Gómez, D.O.
Formato:	Artículo publishedVersion
Publicado:	2010
Materias:	Magnetic fiels MHD Sun: corona Sun: X-rays Turbulence
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_17439213_v6_nS273_p44_Gomez http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_17439213_v6_nS273_p44_Gomez_oai
Aporte de:	Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires

id	I28-R145-paper_17439213_v6_nS273_p44_Gomez_oai
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spelling	I28-R145-paper_17439213_v6_nS273_p44_Gomez_oai2020-10-19 Gómez, D.O. 2010 Recent observations of coronal loops in solar active regions show that their heating must be a truly dynamic process. Even though it seems clear that the energy source is the magnetic field that confines the coronal plasma, the details of how it dissipates are still a matter of debate. In this presentation we review the theoretical models of coronal heating, which have been traditionally clasified as DC or AC depending on the electrodynamic response of the loops to the photospheric driving motions. Also, we show results from numerical simulations of the internal dynamics of coronal loops within the framework of the reduced MHD approximation. These simulations indicate that the application of a stationary velocity field at the photospheric boundary leads to a turbulent stationary regime after several photospheric turnover times. Once this turbulent regime is set, both DC and AC stresses dissipate at faster rates as a result of a direct energy cascade. © International Astronomical Union 2011. Fil:Gómez, D.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_17439213_v6_nS273_p44_Gomez info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Proc. Int. Astron. Union 2010;6(S273):44-50 Magnetic fiels MHD Sun: corona Sun: X-rays Turbulence Heating of coronal active regions info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_17439213_v6_nS273_p44_Gomez_oai
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-145
collection	Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic	Magnetic fiels MHD Sun: corona Sun: X-rays Turbulence
spellingShingle	Magnetic fiels MHD Sun: corona Sun: X-rays Turbulence Gómez, D.O. Heating of coronal active regions
topic_facet	Magnetic fiels MHD Sun: corona Sun: X-rays Turbulence
description	Recent observations of coronal loops in solar active regions show that their heating must be a truly dynamic process. Even though it seems clear that the energy source is the magnetic field that confines the coronal plasma, the details of how it dissipates are still a matter of debate. In this presentation we review the theoretical models of coronal heating, which have been traditionally clasified as DC or AC depending on the electrodynamic response of the loops to the photospheric driving motions. Also, we show results from numerical simulations of the internal dynamics of coronal loops within the framework of the reduced MHD approximation. These simulations indicate that the application of a stationary velocity field at the photospheric boundary leads to a turbulent stationary regime after several photospheric turnover times. Once this turbulent regime is set, both DC and AC stresses dissipate at faster rates as a result of a direct energy cascade. © International Astronomical Union 2011.
format	Artículo Artículo publishedVersion
author	Gómez, D.O.
author_facet	Gómez, D.O.
author_sort	Gómez, D.O.
title	Heating of coronal active regions
title_short	Heating of coronal active regions
title_full	Heating of coronal active regions
title_fullStr	Heating of coronal active regions
title_full_unstemmed	Heating of coronal active regions
title_sort	heating of coronal active regions
publishDate	2010
url	http://hdl.handle.net/20.500.12110/paper_17439213_v6_nS273_p44_Gomez http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_17439213_v6_nS273_p44_Gomez_oai
work_keys_str_mv	AT gomezdo heatingofcoronalactiveregions
_version_	1766026799229173760

Heating of coronal active regions

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