3 citations · 3 across the 2 of their papers we have counts for
6 papers
The shock-patterned solar chromosphere in the light of ALMA
S. Wedemeyer-Boehm, H. -G. Ludwig, M. Steffen +2
Recent three-dimensional radiation hydrodynamic simulations by Wedemeyer et al. (2004) suggest that the solar chromosphere is highly structured in space and time on scales of only…
3D Simulation of Convection and Spectral Line Formation in A-type Stars
M. Steffen, B. Freytag, H. -G. Ludwig
We present first realistic numerical simulations of 3D radiative convection in the surface layers of main sequence A-type stars with Teff = 8000 K and 8500 K, log g = 4.4 and 4.0,…
Effects of Photospheric Temperature Inhomogeneities on Lithium Abundance Determinations (2D)
R. Cayrel, M. Steffen
Based on detailed 2D radiation hydrodynamics (RHD) simulations, we have investigated the effects of photospheric temperature inhomogeneities induced by convection on spectroscopic…
2D Numerical Simulation of Stellar Convection
Matthias Steffen
The dynamics and thermal structure of the surface layers of stars with outer convection zones can be studied in some detail by means of numerical simulations of time-dependent comp…
On the Transition from AGB Stars to Planetaries: The Spherical Case
Detlef Schoenberner, Matthias Steffen
We discuss the basic physical model and the relevant processes responsible for creating and shaping planetary nebulae out of a cool AGB wind envelope. We show that a hydrodynamical…
A calibration of the mixing-length for solar-type stars based on hydrodynamical simulations - I. Methodical aspects and results for solar metallicity
H. -G. Ludwig, B. Freytag, M. Steffen
Based on detailed 2D numerical radiation hydrodynamics (RHD) calculations of time-dependent compressible convection, we have studied the dynamics and thermal structure of the conve…