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Simulations of Turbulent, Active and Rotating Suns and Stars

Objective

The STARS2 project aims at modelling on massively parallel supercomputers in a self-consistent and three-dimensional way, the complex, time dependent and nonlinear dynamics operating in the Sun and stars. In particular we wish to understand how stars generate the wide variety of magnetic activity that is observed, with the Sun - given its proximity and its influence on our technical society - playing a central role in characterizing, studying, and constraining the dynamical processes acting in stellar convection and radiation zones. Studying the solar-stellar connection is crucial because it will allow us to understand why depending on the spectral type of the star considered, this activity can be cyclic, irregular, or simply modulated. The mechanism thought to be at the origin of the magnetism seen in late type stars is likely to be linked to dynamo action in the upper convective layers of such stars. The simultaneous existence in stars of convective turbulent motions, of rotation and its associated shear layers, favour the emergence of a small and/or large scale magnetic field through induction. For more massive stars, possessing a convective core, understanding the interaction between the dynamo generated magnetic field in the core and the magnetic field of their radiative envelope constitute major challenges in stellar fluid dynamics. To achieve these challenging scientific goals, the STARS2 project propose to federate a team of young bright scientists around the PI and to perform and to analyse sophisticated and more realistic high performance global MHD numerical simulations of the Sun and other stellar spectral types. These simulations are at the front-edge of current research in astrophysics, they require the use of the latest class of supercomputers available in Europe and will lead to real scientific breakthroughs. Understanding the interactions between convection, turbulence, shear, rotation and magnetic fields in stars IS the main goal of this project.

Field of science

  • /engineering and technology/electrical engineering, electronic engineering, information engineering/electronic engineering/computer hardware/supercomputer
  • /natural sciences/physical sciences/astronomy/astrophysics
  • /natural sciences/physical sciences/classical mechanics/fluid mechanics/fluid dynamics

Call for proposal

ERC-2007-StG
See other projects for this call

Funding Scheme

ERC-SG - ERC Starting Grant

Host institution

COMMISSARIAT A L ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Address
Rue Leblanc 25
75015 Paris 15
France
Activity type
Research Organisations
EU contribution
€ 880 000
Principal investigator
Allan Sacha Brun (Dr.)
Administrative Contact
Nathalie Judas (Ms.)

Beneficiaries (1)

COMMISSARIAT A L ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
France
EU contribution
€ 880 000
Address
Rue Leblanc 25
75015 Paris 15
Activity type
Research Organisations
Principal investigator
Allan Sacha Brun (Dr.)
Administrative Contact
Nathalie Judas (Ms.)