Copper and Barium Abundances in the Ursa Major Moving Group
Astrophysics
2009-10-31 v1
Abstract
We present Cu and Ba abundances for 7 G-K dwarf stars, members of the solar-metallicity, 0.3 Gyr old Ursa Major Moving Group. All analyzed member stars show [Ba/Fe] excesses of +0.3-plus, associated with [Cu/Fe] deficiencies of up to -0.23 dex. The present results suggest that there is an anti-correlation between the abundances of Cu and the heavy elements produced by the main component of the neutron capture s-process. Other possible anomalies are Na and C deficiencies with respect to normal solar-metallicity stars. The new data do not confirm the recent claim that the group member HR6094 is a Ba dwarf star.
Keywords
Cite
@article{arxiv.astro-ph/9901209,
title = {Copper and Barium Abundances in the Ursa Major Moving Group},
author = {S. Castro and G. F. Porto de Mello and L. da Silva},
journal= {arXiv preprint arXiv:astro-ph/9901209},
year = {2009}
}
Comments
8 pages, 6 figures, accepted to MNRAS