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Abstract:

We present a new technique suitable for a detailed comparison between solar dynamo models and observations. The method is based on the technique of dynamo spectroscopy proposed by Hoyng & Schutgens (1995) and bi-orthogonal decomposition of solar data. This decomposition provides a representation of the mean and fluctuating components of the flows, yielding relevant information for the comparison. To illustrate the method, we use a simple kinematic dynamo model of the solar cycle. Irregularities are introduced in the evolution of the magnetic fields modeling the turbulent behavior of the solar convective region with a random perturbation on the external source for the poloidal field. After fine tuning the parameters of the model we obtain solar like solutions displaying a magnetic cycle of 22 years, with fluctuations in its period and amplitude. In addition, the model generates Maunder-like events with a time span of 60-100 years.

Registro:

Documento: Artículo
Título:A new technique for comparing solar dynamo models and observations
Autor:Mininni, P.D.; Gómez, D.O.
Filiación:Departamento de Física, Fac. de Ciencias Exactas y Naturales, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Inst. de Astronomia y Fis. del E., CONICET, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Advanced Study Program, Natl. Ctr. for Atmospheric Research, PO Box 3000, Boulder, CO 80307, United States
Palabras clave:Magnetohydrodynamics (MHD); Sun: magnetic fields; Sun: sunspots; Astrophysics; Chaos theory; Kinematics; Magnetic fields; Magnetohydrodynamics; Random processes; Satellite observatories; Spectroscopy; Solar cycle; Stochasticity; Sun: magnetic fields; Sun: sunspots; Sun
Año:2004
Volumen:426
Número:3
Página de inicio:1065
Página de fin:1073
DOI: http://dx.doi.org/10.1051/0004-6361:20040428
Título revista:Astronomy and Astrophysics
Título revista abreviado:Astron. Astrophys.
ISSN:00046361
CODEN:AAEJA
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_00046361_v426_n3_p1065_Mininni.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v426_n3_p1065_Mininni

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Citas:

---------- APA ----------
Mininni, P.D. & Gómez, D.O. (2004) . A new technique for comparing solar dynamo models and observations. Astronomy and Astrophysics, 426(3), 1065-1073.
http://dx.doi.org/10.1051/0004-6361:20040428
---------- CHICAGO ----------
Mininni, P.D., Gómez, D.O. "A new technique for comparing solar dynamo models and observations" . Astronomy and Astrophysics 426, no. 3 (2004) : 1065-1073.
http://dx.doi.org/10.1051/0004-6361:20040428
---------- MLA ----------
Mininni, P.D., Gómez, D.O. "A new technique for comparing solar dynamo models and observations" . Astronomy and Astrophysics, vol. 426, no. 3, 2004, pp. 1065-1073.
http://dx.doi.org/10.1051/0004-6361:20040428
---------- VANCOUVER ----------
Mininni, P.D., Gómez, D.O. A new technique for comparing solar dynamo models and observations. Astron. Astrophys. 2004;426(3):1065-1073.
http://dx.doi.org/10.1051/0004-6361:20040428