A Reappraisal of the Solar Photospheric C/O Ratio

Bibcode
2002ApJ...573L.137A
DOI
10.1086/342095
Allende Prieto, Carlos; Lambert, David L.; Asplund, Martin
Referencia bibliográfica

The Astrophysical Journal, Volume 573, Issue 2, pp. L137-L140.

Fecha de publicación:
7
2002
Revista
The Astrophysical Journal
Número de autores
3
Número de autores del IAC
0
Número de citas
380
Número de citas referidas
334
Descripción
An accurate determination of photospheric solar abundances requires detailed modeling of the solar granulation and accounting for departures from local thermodynamical equilibrium (LTE). We argue that the forbidden C I line at 8727 Å is largely immune to departures from LTE and can be realistically modeled using LTE radiative transfer in a time-dependent three-dimensional simulation of solar surface convection. We analyze the [C I] line in the solar flux spectrum to derive the abundance logɛ(C)=8.39+/-0.04 dex. Combining this result with our parallel analysis of [O I] λ6300, we find C/O=0.50+/-0.07, in agreement with the ratios measured in the solar corona from gamma-ray spectroscopy and solar energetic particles.
Tipo
Con árbitro

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