Solar abundances and 3D model atmospheres

Details Solar abundances and 3D model atmospheres Solar abundances and 3D model atmospheres

2009-11-22

arxiv.org/abs/0911.4248v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Contributed paper, to be published in the proceedings of IAU Symposium 265, eds. K. Cunha, M. Spite, and B. Barbuy, Cambridge

Scientific paper

We present solar photospheric abundances for 12 elements from optical and near-infrared spectroscopy. The abundance analysis was conducted employing 3D hydrodynamical (CO5BOLD) as well as standard 1D hydrostatic model atmospheres. We compare our results to others with emphasis on discrepancies and still lingering problems, in particular exemplified by the pivotal abundance of oxygen. We argue that the thermal structure of the lower solar photosphere is very well represented by our 3D model. We obtain an excellent match of the observed center-to-limb variation of the line-blanketed continuum intensity, also at wavelengths shortward of the Balmer jump.

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