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Article Dans Une Revue Publications of the Astronomical Society of Australia Année : 2009

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

Résumé

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.

Dates et versions

hal-03785312 , version 1 (23-09-2022)

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Citer

E. Maiorca, Elisabetta Caffau, Piercarlo Bonifacio, M. Busso, R. Faraggiana, et al.. The Solar Photospheric Nitrogen Abundance: Determination with 3D and 1D Model Atmospheres. Publications of the Astronomical Society of Australia, 2009, 26, pp.345-350. ⟨10.1071/AS08056⟩. ⟨hal-03785312⟩
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