Uncertainties in the solar photospheric oxygen abundance
arXiv:1701.06809 · doi:10.1051/0004-6361/201629446
Abstract
The purpose of this work is to better understand the confidence limits of the photospheric solar oxygen abundance derived from three-dimensional models using the forbidden [OI] line at 6300 Å, including correlations with other parameters involved. We worked with a three-dimensional empirical model and two solar intensity atlases. We employed Bayesian inference as a tool to determine the most probable value for the solar oxygen abundance given the model chosen. We considered a number of error sources, such as uncertainties in the continuum derivation, in the wavelength calibration and in the abundance/strength of Ni. Our results shows correlations between the effects of several parameters employed in the derivation. The Bayesian analysis provides robust confidence limits taking into account all of these factors in a rigorous manner. We obtain that, given the empirical three-dimensional model and the atlas observations employed here, the most probable value for the solar oxygen abundance is . However, we note that this uncertainty does not consider possible sources of systematic errors due to the model choice.
Accepted for publication in Astronomy and Astrophysics
References in corpus (6)
- Helioseismology and Solar Abundances
- An Open Source, Massively Parallel Code for Non-LTE Synthesis and Inversion of Spectral Lines and Zeeman-induced Stokes Profiles
- On the solar nickel and oxygen abundances
- A new approach to the solar oxygen abundance problem
- The photospheric solar oxygen project: III. Investigation of the centre-to-limb variation of the 630nm [OI]-NiI blend
- The Solar Oxygen Abundance from an Empirical Three-Dimensional Model