(Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482
A first three-dimensional model for the carbon monoxide
concentration in the solar atmosphere
The time-dependent and self-consistent treatment of carbon
monoxide (CO) has been added to the radiation
chemo-hydrodynamics code CO5BOLD. It includes
the solution of a chemical reaction network and the advection of the
resulting particle densities with the hydrodynamic flow field. Here
we present a first 3D simulation of the non-magnetic solar
photosphere and low chromosphere, calculated with the upgraded code.
In the resulting model, the highest amount of CO is located in the
cool regions of the reversed granulation pattern in the middle
photosphere. A large fraction of carbon is bound by CO throughout
the chromosphere with exception of hot shock waves where the CO
concentration is strongly reduced. The distribution of carbon
monoxide is very inhomogeneous due to co-existing regions of hot and
cool gas caused by the hydrodynamic flow. High-resolution
observations of CO could thus provide important constraints for the
thermal structure of the solar photosphere and chromosphere.
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