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Reconciling solar and stellar magnetic cycles with nonlinear dynamo simulations.
Strugarek, A; Beaudoin, P; Charbonneau, P; Brun, A S; do Nascimento, J-D.
Afiliación
  • Strugarek A; Département de Physique, Université de Montréal, C.P. 6128 Succursale Centre-Ville, Montréal, Quebec H3C-3J7, Canada. antoine.strugarek@cea.fr.
  • Beaudoin P; Laboratoire Astrophysique, Instrumentation, Modélisation Paris-Saclay, Commissariat à l'Energie Atomique et aux Energies Alternatives/Irfu Université Paris-Diderot CNRS/Institut National des Sciences de l'Univers, F-91191 Gif-sur-Yvette, Paris, France.
  • Charbonneau P; Département de Physique, Université de Montréal, C.P. 6128 Succursale Centre-Ville, Montréal, Quebec H3C-3J7, Canada.
  • Brun AS; Département de Physique, Université de Montréal, C.P. 6128 Succursale Centre-Ville, Montréal, Quebec H3C-3J7, Canada.
  • do Nascimento JD; Laboratoire Astrophysique, Instrumentation, Modélisation Paris-Saclay, Commissariat à l'Energie Atomique et aux Energies Alternatives/Irfu Université Paris-Diderot CNRS/Institut National des Sciences de l'Univers, F-91191 Gif-sur-Yvette, Paris, France.
Science ; 357(6347): 185-187, 2017 07 14.
Article en En | MEDLINE | ID: mdl-28706068
The magnetic fields of solar-type stars are observed to cycle over decadal periods-11 years in the case of the Sun. The fields originate in the turbulent convective layers of stars and have a complex dependency upon stellar rotation rate. We have performed a set of turbulent global simulations that exhibit magnetic cycles varying systematically with stellar rotation and luminosity. We find that the magnetic cycle period is inversely proportional to the Rossby number, which quantifies the influence of rotation on turbulent convection. The trend relies on a fundamentally nonlinear dynamo process and is compatible with the Sun's cycle and those of other solar-type stars.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Science Año: 2017 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Science Año: 2017 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Estados Unidos