Bibcode
DOI
Centeno, R.; Socas-Navarro, H.
Bibliographical reference
The Astrophysical Journal, Volume 682, Issue 1, pp. L61-L64.
Advertised on:
7
2008
Journal
Citations
45
Refereed citations
39
Description
In this work we present new data that sets strong constraints on the
solar oxygen abundance. Our approach, based on the analysis of
spectropolarimetric observations, is almost model-independent and
therefore extremely robust. The asymmetry of the Stokes V profile of the
6300 Å [O I] and Ni I blend is used as an indicator of the
relative abundances of these two elements. The peculiar shape of the
profile requires a value of ɛO = 730 +/- 100 ppm
(parts per million), or logɛO = 8.86 +/- 0.07 in the
logarithmic scale commonly used in astrophysics. The uncertainty range
includes the model dependence as well as uncertainties in the oscillator
strengths of the lines. We emphasize that the very low degree of model
dependence in our analysis makes it very reliable compared to
traditional determinations.
Related projects
Magnetism, Polarization and Radiative Transfer in Astrophysics
Magnetic fields pervade all astrophysical plasmas and govern most of the variability in the Universe at intermediate time scales. They are present in stars across the whole Hertzsprung-Russell diagram, in galaxies, and even perhaps in the intergalactic medium. Polarized light provides the most reliable source of information at our disposal for the
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