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A Reappraisal of the Solar Photospheric C/O Ratio
Open accessAbstract
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 log (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.
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Cited by
The Chemical Composition of the Sun
Asplund, M., Grevesse, N., Sauval, A. J., & Scott, P. (2009) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.46.060407.145222 · Cited by 9,346
Self-citationEvolution of Asymptotic Giant Branch Stars
Herwig, F. (2005) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.43.072103.150600 · Cited by 1,051
Eldridge, J. J., Stanway, E. R., Xiao, L., McClelland, L. A. S., Taylor, G., Ng, M., Greis, S. M. L., & Bray, J. C. (2017) · Publications of the Astronomical Society of Australia · doi:10.1017/pasa.2017.51 · Cited by 1,019
CO self-shielding as the origin of oxygen isotope anomalies in the early solar nebula
Lyons, J. R., & Young, E. D. (2005) · Nature · doi:10.1038/nature03557 · Cited by 401
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Metadata
- Authors
- Allende Prieto, C., Lambert, D. L., & Asplund, M.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2002-07-10
- Volume
- 573
- Issue
- 2
- Pages
- L137-L140
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2101798377
- Cited by
- 429
- References
- 0
- FWCI
- 39.35
- Type
- journal article
- Language
- en
- Open access
- bronze
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