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Global MHD simulations of the solar convective zone using a volleyball mesh decomposition. I. Pilot
Andrius Popovas, Åke Nordlund, Mikolaj Szydlarski
Solar modelling has long been split into ''internal'' and ''surface'' modelling, because of the lack of tools to connect the very different scales in space and time, as well as the…
Improvements to stellar structure models, based on a grid of 3D convection simulations. II. Calibrating the mixing-length formulation
Regner Trampedach, Robert F. Stein, Jørgen Christensen-Dalsgaard +2
We perform a calibration of the mixing length of convection in stellar structure models against realistic 3D radiation-coupled hydrodynamics (RHD) simulations of convection in stel…
Improvements to Stellar Structure Models, Based on a Grid of 3D Convection Simulations. I. -Relations
Regner Trampedach, Robert F. Stein, Jørgen Christensen-Dalsgaard +2
Relations between temperature, T, and optical depth, tau, are often used for describing the photospheric transition from optically thick to optically thin in stellar structure mode…
The Stagger-grid: A Grid of 3D Stellar Atmosphere Models - I. Methods and General Properties
Z. Magic, R. Collet, M. Asplund +5
We present the Stagger-grid, a comprehensive grid of time-dependent, 3D hydrodynamic model atmospheres for late-type stars with realistic treatment of radiative transfer, covering…
Solar Fe abundance and magnetic fields - Towards a consistent reference metallicity
D. Fabbian, F. Moreno-Insertis, E. Khomenko +1
We investigate the impact on Fe abundance determination of including magnetic flux in series of 3D radiation-MHD simulations of solar convection which we used to synthesize spectra…
Comparing Numerical Methods for Isothermal Magnetized Supersonic Turbulence
Alexei G. Kritsuk, Aake Nordlund, David Collins +13
We employ simulations of supersonic super-Alfvenic turbulence decay as a benchmark test problem to assess and compare the performance of nine astrophysical MHD methods actively use…