Bibcode
DOI
Socas-Navarro, H.; Norton, A. A.
Referencia bibliográfica
The Astrophysical Journal, Volume 660, Issue 2, pp. L153-L156.
Fecha de publicación:
5
2007
Revista
Número de citas
45
Número de citas referidas
41
Descripción
In this work we present support for recent claims that advocate a
downward revision of the solar oxygen abundance. Our analysis employs
spatially resolved spectropolarimetric observations including the Fe I
lines at 6302 Å and the O I infrared triplet around 7774 Å
in the quiet Sun. We used the Fe I lines to reconstruct the
three-dimensional thermal and magnetic structure of the atmosphere. The
simultaneous O I observations were then employed to determine the
abundance of oxygen at each pixel, using both LTE and non-LTE (NLTE)
approaches to the radiative transfer. In this manner, we obtain values
of logɛO=8.63 (NLTE) and 8.93 (LTE) dex. We find an
unsettling fluctuation of the oxygen abundance over the field of view.
This is likely an artifact indicating that, even with this relatively
refined strategy, important physical ingredients are still missing in
the picture. By examining the spatial distribution of the abundance, we
estimate realistic confidence limits of approximately 0.1 dex.