Magnetic fielos and dynamos in space ano astrophysical plasmas
Investigation of high energy and plasma astrophysics phenomena: theory, numerical ...
Magnetic reconnection and related processes in collisional and collisionless astro...
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)
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