A NANOFLARE-BASED CELLULAR AUTOMATON MODEL and the OBSERVED PROPERTIES of the CORONAL PLASMA

We use the cellular automaton model described in López Fuentes & Klimchuk to study the evolution of coronal loop plasmas. The model, based on the idea of a critical misalignment angle in tangled magnetic fields, produces nanoflares of varying frequency with respect to the plasma cooling time. We...

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Autores principales: Fuentes, M.L., Klimchuk, J.A.
Formato: JOUR
Materias:
Sun: activity
Sun: corona
Sun: magnetic fields
Sun: X-rays, gamma rays
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0004637X_v828_n2_p_Fuentes
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_0004637X_v828_n2_p_Fuentes
record_format dspace
spelling todo:paper_0004637X_v828_n2_p_Fuentes2023-10-03T14:02:41Z A NANOFLARE-BASED CELLULAR AUTOMATON MODEL and the OBSERVED PROPERTIES of the CORONAL PLASMA Fuentes, M.L. Klimchuk, J.A. Sun: activity Sun: corona Sun: magnetic fields Sun: X-rays, gamma rays We use the cellular automaton model described in López Fuentes & Klimchuk to study the evolution of coronal loop plasmas. The model, based on the idea of a critical misalignment angle in tangled magnetic fields, produces nanoflares of varying frequency with respect to the plasma cooling time. We compare the results of the model with active region (AR) observations obtained with the Hinode/XRT and SDO/AIA instruments. The comparison is based on the statistical properties of synthetic and observed loop light curves. Our results show that the model reproduces the main observational characteristics of the evolution of the plasma in AR coronal loops. The typical intensity fluctuations have amplitudes of 10%-15% both for the model and the observations. The sign of the skewness of the intensity distributions indicates the presence of cooling plasma in the loops. We also study the emission measure (EM) distribution predicted by the model and obtain slopes in log(EM) versus log(T) between 2.7 and 4.3, in agreement with published observational values. © 2016. 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_v828_n2_p_Fuentes
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Sun: activity
Sun: corona
Sun: magnetic fields
Sun: X-rays, gamma rays
spellingShingle Sun: activity
Sun: corona
Sun: magnetic fields
Sun: X-rays, gamma rays
Fuentes, M.L.
Klimchuk, J.A.
A NANOFLARE-BASED CELLULAR AUTOMATON MODEL and the OBSERVED PROPERTIES of the CORONAL PLASMA
topic_facet Sun: activity
Sun: corona
Sun: magnetic fields
Sun: X-rays, gamma rays
description We use the cellular automaton model described in López Fuentes & Klimchuk to study the evolution of coronal loop plasmas. The model, based on the idea of a critical misalignment angle in tangled magnetic fields, produces nanoflares of varying frequency with respect to the plasma cooling time. We compare the results of the model with active region (AR) observations obtained with the Hinode/XRT and SDO/AIA instruments. The comparison is based on the statistical properties of synthetic and observed loop light curves. Our results show that the model reproduces the main observational characteristics of the evolution of the plasma in AR coronal loops. The typical intensity fluctuations have amplitudes of 10%-15% both for the model and the observations. The sign of the skewness of the intensity distributions indicates the presence of cooling plasma in the loops. We also study the emission measure (EM) distribution predicted by the model and obtain slopes in log(EM) versus log(T) between 2.7 and 4.3, in agreement with published observational values. © 2016. The American Astronomical Society. All rights reserved..
format JOUR
author Fuentes, M.L.
Klimchuk, J.A.
author_facet Fuentes, M.L.
Klimchuk, J.A.
author_sort Fuentes, M.L.
title A NANOFLARE-BASED CELLULAR AUTOMATON MODEL and the OBSERVED PROPERTIES of the CORONAL PLASMA
title_short A NANOFLARE-BASED CELLULAR AUTOMATON MODEL and the OBSERVED PROPERTIES of the CORONAL PLASMA
title_full A NANOFLARE-BASED CELLULAR AUTOMATON MODEL and the OBSERVED PROPERTIES of the CORONAL PLASMA
title_fullStr A NANOFLARE-BASED CELLULAR AUTOMATON MODEL and the OBSERVED PROPERTIES of the CORONAL PLASMA
title_full_unstemmed A NANOFLARE-BASED CELLULAR AUTOMATON MODEL and the OBSERVED PROPERTIES of the CORONAL PLASMA
title_sort nanoflare-based cellular automaton model and the observed properties of the coronal plasma
url http://hdl.handle.net/20.500.12110/paper_0004637X_v828_n2_p_Fuentes
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