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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2006
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02731177_v38_n5_p856_Gomez http://hdl.handle.net/20.500.12110/paper_02731177_v38_n5_p856_Gomez |
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paper:paper_02731177_v38_n5_p856_Gomez2023-06-08T15:25:35Z Description of Maunder-like events from a stochastic Alpha-Omega model Gomez, Daniel Osvaldo Mininni, Pablo Daniel 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. 2006 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02731177_v38_n5_p856_Gomez 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 Gomez, Daniel Osvaldo Mininni, Pablo Daniel 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. |
| author |
Gomez, Daniel Osvaldo Mininni, Pablo Daniel |
| author_facet |
Gomez, Daniel Osvaldo Mininni, Pablo Daniel |
| author_sort |
Gomez, Daniel Osvaldo |
| 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 |
| publishDate |
2006 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02731177_v38_n5_p856_Gomez http://hdl.handle.net/20.500.12110/paper_02731177_v38_n5_p856_Gomez |
| work_keys_str_mv |
AT gomezdanielosvaldo descriptionofmaunderlikeeventsfromastochasticalphaomegamodel AT mininnipablodaniel descriptionofmaunderlikeeventsfromastochasticalphaomegamodel |
| _version_ |
1768541843637665792 |