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Magnetic fields and dynamos in space and astrophysical plasmas II

Abstract

The magnetic fields observed in stars and galaxies display magnetic energy comparable to the kinetic energy of the fluids where they are embedded. This is due to the presence of dynamo mechanisms, whereby the kinetic energy is converted into magnetic energy. Dynamos and magnetic fields play a crucial role in the solar variability, with direct impact on the Earth's climate. Moreover, magnetic fields are important for the magnetorotational instability, which is responsible for the generation of turbulence in accretion disks. Such turbulence is necessary for the outward transport of angular momentum, enabling the accretion of matter to the central object and consequently, the formation of stars. This project is a continuation of a previous FAPESP project (2011/50714-4), which proposes the investigation of the nonlinear dynamics of magnetic fields in space and astrophysical plasmas by means of observational data analysis and the numerical solution of the magnetohydrodynamics (MHD) equations. The MHD equations will be solved for different values of the control parameters and boundary conditions, aiming the study of transition to turbulence in accretion disks, magnetic field quenching in the solar dynamo, and transport of passive scalars in magnetoconvection. To make simulations feasible, we propose the duplication of the processing power of the high-performance computing laboratory assembled in the previous project. The laboratory is available to a network of national and international collaborators. (AU)

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Scientific publications (7)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CHERTOVSKIH, R.; CHIMANSKI, E. V.; REMPEL, E. L.. Route to hyperchaos in Rayleigh-Benard convection. EPL, v. 112, n. 1, . (13/22314-7, 13/01242-8)
MIRANDA, R. A.; REMPEL, E. L.; CHIAN, A. C. -L.. On-off intermittency and amplitude-phase synchronization in Keplerian shear flows. Monthly Notices of the Royal Astronomical Society, v. 448, n. 1, p. 804-813, . (13/22314-7, 10/00214-2)
SAIKI, YOSHITAKA; YAMADA, MICHIO; CHIAN, ABRAHAM C. -L.; MIRANDA, RODRIGO A.; REMPEL, ERICO L.. Reconstruction of chaotic saddles by classification of unstable periodic orbits: Kuramoto-Sivashinsky equation. Chaos, v. 25, n. 10, . (13/22314-7)
CHIAN, ABRAHAM C. -L.; REMPEL, ERICO L.; AULANIER, GUILLAUME; SCHMIEDER, BRIGITTE; SHADDEN, SHAWN C.; WELSCH, BRIAN T.; YEATES, ANTHONY R.. DETECTION OF COHERENT STRUCTURES IN PHOTOSPHERIC TURBULENT FLOWS. ASTROPHYSICAL JOURNAL, v. 786, n. 1, . (13/22314-7)
CHERTOVSKIH, R.; CHIAN, A. C. -L.; PODVIGINA, O.; REMPEL, E. L.; ZHELIGOVSKY, V.. EXISTENCE, UNIQUENESS, AND ANALYTICITY OF SPACE-PERIODIC SOLUTIONS TO THE REGULARIZED LONG-WAVE EQUATION. Advances in Differential Equations, v. 19, n. 7-8, p. 725-754, . (13/22314-7)
PODVIGINA, O.; ZHELIGOVSKY, V.; REMPEL, E. L.; CHIAN, A. C. -L.; CHERTOVSKIH, R.; MUNOZ, P. R.. Two-parameter bifurcation study of the regularized long-wave equation. Physical Review E, v. 92, n. 3, . (11/10466-1, 13/22314-7, 12/22243-0, 12/22285-4, 13/01242-8)
CHIMANSKI, EMANUEL V.; REMPEL, ERICO L.; CHERTOVSKIH, ROMAN. On-off intermittency and spatiotemporal chaos in three-dimensional Rayleigh-Benard convection. Advances in Space Research, v. 57, n. 6, p. 1440-1447, . (13/22314-7, 13/01242-8)

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