Copper and barium abundances in the Ursa Major moving group
Jan, 19998 pages
Published in:
- Mon.Not.Roy.Astron.Soc. 305 (1999) 693
e-Print:
- astro-ph/9901209 [astro-ph]
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Abstract: (arXiv)
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.References(0)
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