The solar photospheric abundance of carbon.Analysis of atomic carbon lines with the CO5BOLD solar model

Understand

The use of hydrodynamical simulations, the selection of atomic data, and the computation of deviations from local thermodynamical equilibrium for the analysis of the solar spectra have implied a downward revision of the solar metallicity.

• We are in the process of using the latest simulations computed with the CO5BOLD code to reassess the solar chemical composition.
• We determine the solar photospheric carbon abundance by using a radiation-hydrodynamical CO5BOLD model, and compute the departures from local thermodynamical equilibrium by using the Kiel code.
• We measure equivalent widths of atomic CI lines on high resolution, high signal-to-noise ratio solar atlases.