1-D and 2-D model atmospheres: iron and lithium LTE abundances in the Sun
A.S. Gadun and
Received 25 January 1996 / Accepted 15 January 1997
We discuss LTE abundance determinations of iron and lithium in the solar atmosphere using a grid of one-dimensional (1-D) and two-dimensional (2-D) model atmospheres. These models differ mainly in the convection treatment. We found that the influence of atmospheric inhomogeneities on the iron abundance comprises 0.1 dex for weak Fe I lines with low excitation potentials, and does not exceed 0.05 dex for weak Fe II lines. 2-D models show lower iron abundances for Fe I lines. On the other hand, lithium abundances obtained for 1-D homogeneous and 2-D inhomogeneous model atmospheres differ up to 0.1-0.2 dex. 2-D model atmospheres result in lower lithium abundances, in contradiction with the recent suggestion of Kurucz (1995).
Key words: Sun: abundances Sun: photosphere line: formation
Send offprint requests to: Ya.V. Pavlenko
© European Southern Observatory (ESO) 1997
Online publication: May 26, 1998