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

E. Maiorca; E. Caffau; P. Bonifacio; M. Busso; R. Faraggiana; M. Steffen; H. -G. Ludwig; I. Kamp

doi:10.1071/AS08056

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

E. Maiorca^*, E. Caffau, P. Bonifacio, M. Busso, R. Faraggiana, M. Steffen, H. -G. Ludwig, I. Kamp

^*Corresponding author for this work

Astronomy

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Abstract

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.

Original language	English
Pages (from-to)	345-350
Number of pages	6
Journal	Publications of the Astronomical Society of Australia
Volume	26
Issue number	3
DOIs	https://doi.org/10.1071/AS08056
Publication status	Published - 2009

Keywords

hydrodynamics
line: formation
radiative transfer
Sun: abundances
Sun: granulation
Sun: atmosphere
STATISTICAL EQUILIBRIUM
LINES
SUN
HYDROGEN
OXYGEN

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title = "The Solar Photospheric Nitrogen Abundance: Determination with 3D and 1D Model Atmospheres",

abstract = "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.",

keywords = "hydrodynamics, line: formation, radiative transfer, Sun: abundances, Sun: granulation, Sun: atmosphere, STATISTICAL EQUILIBRIUM, LINES, SUN, HYDROGEN, OXYGEN",

author = "E. Maiorca and E. Caffau and P. Bonifacio and M. Busso and R. Faraggiana and M. Steffen and Ludwig, {H. -G.} and I. Kamp",

year = "2009",

doi = "10.1071/AS08056",

language = "English",

volume = "26",

pages = "345--350",

journal = "Publications of the Astronomical Society of Australia",

issn = "1323-3580",

publisher = "Cambridge University Press",

number = "3",

}

TY - JOUR

T1 - The Solar Photospheric Nitrogen Abundance

T2 - Determination with 3D and 1D Model Atmospheres

AU - Maiorca, E.

AU - Caffau, E.

AU - Bonifacio, P.

AU - Busso, M.

AU - Faraggiana, R.

AU - Steffen, M.

AU - Ludwig, H. -G.

AU - Kamp, I.

PY - 2009

Y1 - 2009

N2 - 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.

AB - 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.

KW - hydrodynamics

KW - line: formation

KW - radiative transfer

KW - Sun: abundances

KW - Sun: granulation

KW - Sun: atmosphere

KW - STATISTICAL EQUILIBRIUM

KW - LINES

KW - SUN

KW - HYDROGEN

KW - OXYGEN

U2 - 10.1071/AS08056

DO - 10.1071/AS08056

M3 - Article

SN - 1323-3580

VL - 26

SP - 345

EP - 350

JO - Publications of the Astronomical Society of Australia

JF - Publications of the Astronomical Society of Australia

IS - 3

ER -

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

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Keywords

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