Rubidium and Lead Abundances in Giant Stars of the Globular Clusters M13 and NGC 6752
Yong, David; Aoki, Wako; Lambert, D.L.; Paulson, D.B.
We present measurements of the neutron-capture elements Rb and Pb in five giant stars of the globular cluster NGC 6752 and Pb measurements in four giants of the globular cluster M13. The abundances were derived by comparing synthetic spectra with high-resolution, high signal-to-noise ratio spectra obtained using HDS on the Subaru telescope and MIKE on the Magellan telescope. The program stars span the range of the O-Al abundance variation. In NGC 6752, the mean abundances are [Rb/Fe] = -0.17 ±...[Show more]
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|Source:||Astrophysical Journal, The|
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