No Heavy Element Dispersion in the Globular Cluster M92

Abstract

Although there have been recent claims that there is a large dispersion in the abundances of the heavy neutron capture elements in the old Galactic globular cluster M92, we show that the measured dispersion for the absolute abundances of four of the rare earth elements within a sample of 12 luminous red giants in M92 (less than or equal to 0.07 dex) does not exceed the relevant sources of uncertainty. As expected from previous studies, the heavy elements show the signature of the r-process. Their abundance ratios are essentially identical to those of M30, another nearby globular cluster of similar metallicity.

Accepted for publication in ApJ Letters

References in corpus (2)

• An abundance analysis of bright giants in the globular cluster NGC 1851
• Neutron-capture elements in the metal-poor globular cluster M15

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