ANTARES -- A Numerical Tool for Astrophysical RESearch -- With applications to solar granulation

Details ANTARES -- A Numerical Tool for Astrophysical RESearch -- With applications to solar granulation ANTARES -- A Numerical Tool for Astrophysical RESearch -- With applications to solar granulation

2009-05-02

arxiv.org/abs/0905.0177v1

New Astron.15:460-475,2010

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

preprint; submitted to NewAst

Scientific paper

10.1016/j.newast.2009.12.005

We discuss the general design of the ANTARES code which is intended for simulations in stellar hydrodynamics with radiative transfer and realistic microphysics in 1D, 2D and 3D. We then compare the quality of various numerical methods. We have applied ANTARES in order to obtain high resolution simulations of solar granulation which we describe and analyze. In order to obtain high resolution, we apply grid refinement to a region predominantly occupied by an exploding granule. Strong, rapidly rotating vortex tubes of small diameter (~100 km) generated by the downdrafts and ascending into the photosphere near the granule boundaries evolve, often entering the photosphere from below in an arclike fashion. They essentially contribute to the turbulent velocity field near the granule boundaries.

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