Magnetic fields and dynamos in space and astrophysical plasmas II

• Grant number: 13/22314-7
• Support type: Regular Research Grants
• Duration: February 01, 2014 - January 31, 2016
• Field of knowledge: Physical Sciences and Mathematics - Astronomy
• Principal researcher: Erico Luiz Rempel
• Grantee: Erico Luiz Rempel
• Home Institution: Divisão de Ciências Fundamentais (IEF). Instituto Tecnológico de Aeronáutica (ITA). Ministério da Defesa (Brasil). São José dos Campos , SP, Brazil
• Assoc. researchers: Pablo Rubén Muñoz Gutberlet ; Roman Chertovskikh

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)

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)

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, MAR 15 2016. Web of Science Citations: 0.

CHERTOVSKIH, R.; CHIMANSKI, E. V.; REMPEL, E. L. Route to hyperchaos in Rayleigh-Benard convection. EPL, v. 112, n. 1 OCT 2015. Web of Science Citations: 3.

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 OCT 2015. Web of Science Citations: 3.

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 SEP 14 2015. Web of Science Citations: 0.

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, MAR 21 2015. Web of Science Citations: 2.

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, JUL-AUG 2014. Web of Science Citations: 1.

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 MAY 1 2014. Web of Science Citations: 15.