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Rubidium and lead abundances in giant stars of the globular clusters M 13 and NGC 6752
David Yong, Wako Aoki, David L. Lambert +1
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 M…
Optical Spectroscopy of a Flare on Barnard's Star
D. Paulson, J. Allred, R. Anderson +3
We present optical spectra of a flare on Barnard's star. Several photospheric as well as chromospheric species were enhanced by the flare heating. An analysis of the Balmer lines s…
Chemical Homogeneity in the Hyades
G. M. De Silva, C. Sneden, D. B. Paulson +4
We present an abundance analysis of the heavy elements Zr, Ba, La, Ce, and Nd for Hyades cluster F-K dwarfs based on high resolution, high S/N ratio spectra from Keck/HIRES. The de…
Low-mass companions to Hyades stars
E. W. Guenther, D. B. Paulson, W. D. Cochran +3
It is now well established that a large fraction of the low-mass stars are binaries or higher order multiples. Similarly a sizable fraction have giant planets. In contrast to these…