Near-surface stellar magneto-convection: simulations for the Sun and a metal-poor solar analog

Details Near-surface stellar magneto-convection: simulations for the Sun and a metal-poor solar analog Near-surface stellar magneto-convection: simulations for the Sun and a metal-poor solar analog

2009-02-16

arxiv.org/abs/0902.2753v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Proc. IAU Symposium 259, Cosmic Magnetic Fields: from Planets, to Stars and Galaxies, K.G. Strassmeier, A.G. Kosovichev and J.

Scientific paper

10.1017/S174392130903052X

We present 2D local box simulations of near-surface radiative magneto-convection with prescribed magnetic flux, carried out with the MHD version of the CO5BOLD code for the Sun and a solar-like star with a metal-poor chemical composition (metal abundances reduced by a factor 100, [M/H]=-2). The resulting magneto-hydrodynamical models can be used to study the influence of the metallicity on the properties of magnetized stellar atmospheres. A preliminary analysis indicates that the horizontal magnetic field component tends to be significantly stronger in the optically thin layers of metal-poor stellar atmospheres.

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