Astrophysics, abstract
astro-ph/0612200

From: Carlos Allende Prieto [view email]

Date: Fri, 8 Dec 2006 00:48:48 GMT (44kb)

Solar Chemical Peculiarities?

Authors: Carlos Allende Prieto (University of Texas at Austin)

Comments: 4 pages, 2 figures, to appear in the proceedings of the conference "The Metal-Rich Universe", (La Palma, June 2006), eds. G. Israelian and G. Meynet (Cambridge Univ. Press)

Several investigations of FGK stars in the solar neighborhood have suggested that thin-disk stars with an iron abundance similar to the Sun appear to show higher abundances of other elements, such as silicon, titanium, or nickel. Offsets could arise if the samples contain stars with ages, mean galactocentric distances, or kinematics, that differ on average from the solar values. They could also arise due to systematic errors in the abundance determinations, if the samples contain stars that are different from the Sun regarding their atmospheric parameters. We re-examine this issue by studying a sample of 80 nearby stars with solar-like colors and luminosities. Among these solar "analogs", the objects with solar iron abundances exhibit solar abundances of carbon, silicon, calcium, titanium and nickel.

http://arxiv.org/abs/astro-ph/0612200