Description of Maunder-like events from a stochastic Alpha-Omega model

One of the most impressive solar phenomena is its magnetic activity cycle. The number of sunspots observed in the solar surface varies with a period of approximately 11 years. Superimposed to this cyclic behavior, there are sporadic events such as the Maunder minimum, during which very few sunspots...

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Autores principales: Gómez, D.O., Mininni, P.D.
Formato: JOUR
Materias:
Maunder minimum
Solar cycle
Computer simulation
Heat convection
Magnetic field effects
Mathematical models
Random processes
Surface phenomena
Velocity
Differential rotation
Magnetic activity cycle
Solar system
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02731177_v38_n5_p856_Gomez
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_02731177_v38_n5_p856_Gomez
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spelling todo:paper_02731177_v38_n5_p856_Gomez2023-10-03T15:15:36Z Description of Maunder-like events from a stochastic Alpha-Omega model Gómez, D.O. Mininni, P.D. Maunder minimum Solar cycle Computer simulation Heat convection Magnetic field effects Mathematical models Random processes Surface phenomena Velocity Differential rotation Magnetic activity cycle Maunder minimum Solar cycle Solar system One of the most impressive solar phenomena is its magnetic activity cycle. The number of sunspots observed in the solar surface varies with a period of approximately 11 years. Superimposed to this cyclic behavior, there are sporadic events such as the Maunder minimum, during which very few sunspots were detected. In the present work, an Alpha-Omega dynamo model is proposed to study these phenomena. We use velocity profiles of the solar interior obtained from helioseismology, which include differential rotation (the Ω-effect), a meridional flow and the turbulent velocity field of the convective region (the α-effect). By simulating the helicoidal and disordered flow of the giant cells through a stochastic component in the α coefficient, we reproduce not only the periodic behavior of the solar cycle, but also sporadic events such as the Maunder minimum. This model suggests the existence of a link between giant cell fluctuations and the irregularities observed in the solar cycle, such as north-south asymmetries and secular variations like the Maunder minimum. © 2005 COSPAR. Fil:Gómez, D.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mininni, P.D. 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_02731177_v38_n5_p856_Gomez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Maunder minimum
Solar cycle
Computer simulation
Heat convection
Magnetic field effects
Mathematical models
Random processes
Surface phenomena
Velocity
Differential rotation
Magnetic activity cycle
Maunder minimum
Solar cycle
Solar system
spellingShingle Maunder minimum
Solar cycle
Computer simulation
Heat convection
Magnetic field effects
Mathematical models
Random processes
Surface phenomena
Velocity
Differential rotation
Magnetic activity cycle
Maunder minimum
Solar cycle
Solar system
Gómez, D.O.
Mininni, P.D.
Description of Maunder-like events from a stochastic Alpha-Omega model
topic_facet Maunder minimum
Solar cycle
Computer simulation
Heat convection
Magnetic field effects
Mathematical models
Random processes
Surface phenomena
Velocity
Differential rotation
Magnetic activity cycle
Maunder minimum
Solar cycle
Solar system
description One of the most impressive solar phenomena is its magnetic activity cycle. The number of sunspots observed in the solar surface varies with a period of approximately 11 years. Superimposed to this cyclic behavior, there are sporadic events such as the Maunder minimum, during which very few sunspots were detected. In the present work, an Alpha-Omega dynamo model is proposed to study these phenomena. We use velocity profiles of the solar interior obtained from helioseismology, which include differential rotation (the Ω-effect), a meridional flow and the turbulent velocity field of the convective region (the α-effect). By simulating the helicoidal and disordered flow of the giant cells through a stochastic component in the α coefficient, we reproduce not only the periodic behavior of the solar cycle, but also sporadic events such as the Maunder minimum. This model suggests the existence of a link between giant cell fluctuations and the irregularities observed in the solar cycle, such as north-south asymmetries and secular variations like the Maunder minimum. © 2005 COSPAR.
format JOUR
author Gómez, D.O.
Mininni, P.D.
author_facet Gómez, D.O.
Mininni, P.D.
author_sort Gómez, D.O.
title Description of Maunder-like events from a stochastic Alpha-Omega model
title_short Description of Maunder-like events from a stochastic Alpha-Omega model
title_full Description of Maunder-like events from a stochastic Alpha-Omega model
title_fullStr Description of Maunder-like events from a stochastic Alpha-Omega model
title_full_unstemmed Description of Maunder-like events from a stochastic Alpha-Omega model
title_sort description of maunder-like events from a stochastic alpha-omega model
url http://hdl.handle.net/20.500.12110/paper_02731177_v38_n5_p856_Gomez
work_keys_str_mv AT gomezdo descriptionofmaunderlikeeventsfromastochasticalphaomegamodel
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