The Solar Photospheric Nitrogen Abundance: Determination with 3D and 1D Model Atmospheres | Publications of the Astronomical Society of Australia | Cambridge Core (original) (raw)

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the 'Save PDF' action button.

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 5bold 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.

References

Allende Prieto, C., Lambert, D. L. & Asplund, M., 2001, ApJ, 556, L63 Google Scholar

Asplund, M., Grevesse, N., Sauval, A. J., Allende Prieto, C. & Kiselman, D., 2004, A&A, 417, 751 Google Scholar

Asplund, M., Grevesse, N. & Sauval, A. J., 2005, ASPC, 336, 25 Google Scholar

Aufdenberg, J. P., Ludwig, H.-G. & Kervella, P., 2005, ApJ, 633, 424 Google Scholar

Biémont, E., Froese Fischer, C., Godefroid, M.,Vaeck, N. & Hibbert, A., 1990, in Proc. 3rd International Colloquium of the Royal Netherlands Academy of Arts and Sciences, Ed. Hansen J. E. (Amsterdam: North–Holland), 59 Google Scholar

Caffau, E., Bonifacio, P., Faraggiana, R., François, P., Gratton, R. G. & Barbieri, M., 2005, A&A, 441, 533 Google Scholar

Caffau, E., Ludwig, H.-G., Steffen, M., Ayres, T. R., Bonifacio, P., Cayrel, R., Freytag, B. & Plez, B., 2008, A&A, 488, 1031 Google Scholar

Delbouille, L., Roland, G. & Neven, L., 1973, Atlas photometrique du spectre solaire de _λ_3000 a _λ_10 000 (Liege: Universite de Liege, Institut d'Astrophysique)Google Scholar

Freytag, B., Steffen, M. & Dorch, B., 2002, AN, 323, 213 Google Scholar

Grevesse, N., Lambert, D. L., Sauval, A. J., van Dishoeck, E. F., Farmer, C. B. & Norton, R. H., 1990, A&A, 232, 225 Google Scholar

Kurucz, R., 1993a, ATLAS9 Stellar Atmosphere Programs and 2 km/s grid (Cambridge, Mass.: Smithsonian Astrophysical Observatory)Google Scholar

Kurucz, R., 1993b, SYNTHE Spectrum Synthesis Programs and Line Data (Cambridge, Mass.: Smithsonian Astrophysical Observatory)Google Scholar

Sbordone, L., Bonifacio, P., Castelli, F. & Kurucz, R. L., 2004, MSAIS, 5, 93 Google Scholar

Wedemeyer, S., Freytag, B., Steffen, M., Ludwig, H.-G. & Holweger, H., 2004, A&A, 414, 1121 Google Scholar