The Solar Photospheric Nitrogen Abundance: Determination with 3D and 1D Model Atmospheres

Details The Solar Photospheric Nitrogen Abundance: Determination with 3D and 1D Model Atmospheres The Solar Photospheric Nitrogen Abundance: Determination with 3D and 1D Model Atmospheres

2009-12-02

arxiv.org/abs/0912.0375v1

Publ.Astron.Soc.Austral.26:345-350,2009

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

6 pages, 4 figures

Scientific paper

10.1071/AS08056

We present a new determination of the solar nitrogen abundance making use of 3D hydrodynamical modelling of the solar photosphere, which is more physically motivated than traditional static 1D models. We selected suitable atomic spectral lines, relying on equivalent width measurements already existing in the literature. For atmospheric modelling we used the co 5 bold 3D radiation hydrodynamics code. We investigated the influence of both deviations from local thermodynamic equilibrium (non-LTE effects) and photospheric inhomogeneities (granulation effects) on the resulting abundance. We also compared several atlases of solar flux and centre-disc intensity presently available. As a result of our analysis, the photospheric solar nitrogen abundance is A(N) = 7.86 +/- 0.12.

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